// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/frame_host/navigation_controller_impl.h"

#include <stdint.h>
#include <algorithm>
#include <utility>
#include <vector>

#include "base/bind.h"
#include "base/command_line.h"
#include "base/files/scoped_temp_dir.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/sequenced_task_runner.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/post_task.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/scoped_feature_list.h"
#include "base/threading/sequenced_task_runner_handle.h"
#include "base/threading/thread_restrictions.h"
#include "build/build_config.h"
#include "content/browser/frame_host/frame_navigation_entry.h"
#include "content/browser/frame_host/frame_tree.h"
#include "content/browser/frame_host/navigation_entry_impl.h"
#include "content/browser/frame_host/navigation_handle_impl.h"
#include "content/browser/frame_host/navigation_request.h"
#include "content/browser/frame_host/render_frame_host_impl.h"
#include "content/browser/renderer_host/display_util.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/browser/web_contents/web_contents_view.h"
#include "content/common/frame_messages.h"
#include "content/common/page_state_serialization.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/navigation_controller.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/resource_dispatcher_host.h"
#include "content/public/browser/resource_dispatcher_host_delegate.h"
#include "content/public/browser/resource_throttle.h"
#include "content/public/browser/site_isolation_policy.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_delegate.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/common/bindings_policy.h"
#include "content/public/common/content_features.h"
#include "content/public/common/renderer_preferences.h"
#include "content/public/common/screen_info.h"
#include "content/public/common/url_constants.h"
#include "content/public/common/use_zoom_for_dsf_policy.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/public/test/download_test_observer.h"
#include "content/public/test/navigation_handle_observer.h"
#include "content/public/test/test_navigation_observer.h"
#include "content/public/test/test_utils.h"
#include "content/public/test/url_loader_interceptor.h"
#include "content/shell/browser/shell.h"
#include "content/shell/browser/shell_download_manager_delegate.h"
#include "content/shell/common/shell_switches.h"
#include "content/test/content_browser_test_utils_internal.h"
#include "content/test/did_commit_provisional_load_interceptor.h"
#include "net/dns/mock_host_resolver.h"
#include "net/test/embedded_test_server/controllable_http_response.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "net/test/embedded_test_server/http_request.h"
#include "net/test/url_request/url_request_failed_job.h"
#include "testing/gmock/include/gmock/gmock.h"

namespace {

static const char kAddNamedFrameScript[] =
    "var f = document.createElement('iframe');"
    "f.name = 'foo-frame-name';"
    "document.body.appendChild(f);";
static const char kRemoveFrameScript[] =
    "var f = document.querySelector('iframe');"
    "f.parentNode.removeChild(f);";

using testing::ElementsAre;
using testing::IsEmpty;

}  // namespace

namespace content {

class NavigationControllerBrowserTest : public ContentBrowserTest {
 protected:
  void SetUpOnMainThread() override {
    host_resolver()->AddRule("*", "127.0.0.1");
    content::SetupCrossSiteRedirector(embedded_test_server());
    ASSERT_TRUE(embedded_test_server()->Start());
  }
};

// Ensure that tests can navigate subframes cross-site in both default mode and
// --site-per-process, but that they only go cross-process in the latter.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, LoadCrossSiteSubframe) {
  // Load a main frame with a subframe.
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1U, root->child_count());
  ASSERT_NE(nullptr, root->child_at(0));

  // Use NavigateFrameToURL to go cross-site in the subframe.
  GURL foo_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  NavigateFrameToURL(root->child_at(0), foo_url);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  // We should only have swapped processes in --site-per-process.
  bool cross_process = root->current_frame_host()->GetProcess() !=
                       root->child_at(0)->current_frame_host()->GetProcess();
  EXPECT_EQ(AreAllSitesIsolatedForTesting(), cross_process);
}

// Verifies that the base, history, and data URLs for LoadDataWithBaseURL end up
// in the expected parts of the NavigationEntry in each stage of navigation, and
// that we don't kill the renderer on reload.  See https://crbug.com/522567.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, LoadDataWithBaseURL) {
  // LoadDataWithBaseURL is never subject to --site-per-process policy today
  // (this API is only used by Android WebView [where OOPIFs have not shipped
  // yet] and GuestView cases [which always hosts guests inside a renderer
  // without an origin lock]).  Therefore, skip the test in --site-per-process
  // mode to avoid renderer kills which won't happen in practice as described
  // above.
  // TODO(lukasza): https://crbug.com/614463: Consider enabling this test
  // once WebView guests support OOPIFs and/or origin locks.
  if (AreAllSitesIsolatedForTesting())
    return;

  const GURL base_url("http://baseurl");
  const GURL history_url("http://historyurl");
  const std::string data = "<html><body>foo</body></html>";
  const GURL data_url = GURL("data:text/html;charset=utf-8," + data);

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // Load data, but don't commit yet.
  TestNavigationObserver same_tab_observer(shell()->web_contents(), 1);
  shell()->LoadDataWithBaseURL(history_url, data, base_url);

  // Verify the pending NavigationEntry.
  NavigationEntryImpl* pending_entry = controller.GetPendingEntry();
  EXPECT_EQ(base_url, pending_entry->GetBaseURLForDataURL());
  EXPECT_EQ(history_url, pending_entry->GetVirtualURL());
  EXPECT_EQ(history_url, pending_entry->GetHistoryURLForDataURL());
  EXPECT_EQ(data_url, pending_entry->GetURL());

  // Let the navigation commit.
  same_tab_observer.Wait();

  // Verify the last committed NavigationEntry.
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(base_url, entry->GetBaseURLForDataURL());
  EXPECT_EQ(history_url, entry->GetVirtualURL());
  EXPECT_EQ(history_url, entry->GetHistoryURLForDataURL());
  EXPECT_EQ(data_url, entry->GetURL());

  // We should use data_url instead of the base_url as the original url of
  // this navigation entry, because base_url is only used for resolving relative
  // paths in the data, or enforcing same origin policy.
  EXPECT_EQ(data_url, entry->GetOriginalRequestURL());

  // Now reload and make sure the renderer isn't killed.
  ReloadBlockUntilNavigationsComplete(shell(), 1);
  EXPECT_TRUE(shell()->web_contents()->GetMainFrame()->IsRenderFrameLive());

  // Verify the last committed NavigationEntry hasn't changed.
  NavigationEntryImpl* reload_entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(entry, reload_entry);
  EXPECT_EQ(base_url, reload_entry->GetBaseURLForDataURL());
  EXPECT_EQ(history_url, reload_entry->GetVirtualURL());
  EXPECT_EQ(history_url, reload_entry->GetHistoryURLForDataURL());
  EXPECT_EQ(data_url, reload_entry->GetOriginalRequestURL());
  EXPECT_EQ(data_url, reload_entry->GetURL());
}

// Verify which page loads when going back to a LoadDataWithBaseURL entry.
// See https://crbug.com/612196.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       LoadDataWithBaseURLTitleAfterBack) {
  // LoadDataWithBaseURL is never subject to --site-per-process policy today
  // (this API is only used by Android WebView [where OOPIFs have not shipped
  // yet] and GuestView cases [which always hosts guests inside a renderer
  // without an origin lock]).  Therefore, skip the test in --site-per-process
  // mode to avoid renderer kills which won't happen in practice as described
  // above.
  // TODO(lukasza): https://crbug.com/614463: Consider enabling this test
  // once WebView guests support OOPIFs and/or origin locks.
  if (AreAllSitesIsolatedForTesting())
    return;

  const GURL base_url("http://baseurl");
  const GURL history_url(
      embedded_test_server()->GetURL("/navigation_controller/form.html"));
  const std::string data1 = "<html><title>One</title><body>foo</body></html>";
  const GURL data_url1 = GURL("data:text/html;charset=utf-8," + data1);

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  {
    TestNavigationObserver same_tab_observer(shell()->web_contents(), 1);
    shell()->LoadDataWithBaseURL(history_url, data1, base_url);
    same_tab_observer.Wait();
  }

  // Verify the last committed NavigationEntry.
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(base_url, entry->GetBaseURLForDataURL());
  EXPECT_EQ(history_url, entry->GetVirtualURL());
  EXPECT_EQ(history_url, entry->GetHistoryURLForDataURL());
  EXPECT_EQ(data_url1, entry->GetURL());
  EXPECT_EQ("http://baseurl", EvalJs(shell(), "self.origin"));
  EXPECT_EQ(url::Origin::Create(base_url),
            shell()->web_contents()->GetMainFrame()->GetLastCommittedOrigin());

  // Navigate again to a different data URL.
  const std::string data2 = "<html><title>Two</title><body>bar</body></html>";
  const GURL data_url2 = GURL("data:text/html;charset=utf-8," + data2);
  {
    TestNavigationObserver same_tab_observer(shell()->web_contents(), 1);
    // Load data, not loaddatawithbaseurl.
    EXPECT_TRUE(NavigateToURL(shell(), data_url2));
    same_tab_observer.Wait();
  }
  url::Origin data_origin =
      shell()->web_contents()->GetMainFrame()->GetLastCommittedOrigin();
  EXPECT_TRUE(data_origin.opaque());
  EXPECT_EQ(url::SchemeHostPort(),
            data_origin.GetTupleOrPrecursorTupleIfOpaque());

  // Go back.
  TestNavigationObserver back_load_observer(shell()->web_contents());
  controller.GoBack();
  back_load_observer.Wait();

  // Check title.  We should load the data URL when going back.
  EXPECT_EQ("One", base::UTF16ToUTF8(shell()->web_contents()->GetTitle()));

  // Verify the last committed NavigationEntry.
  NavigationEntryImpl* back_entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(base_url, back_entry->GetBaseURLForDataURL());
  EXPECT_EQ(history_url, back_entry->GetVirtualURL());
  EXPECT_EQ(history_url, back_entry->GetHistoryURLForDataURL());
  EXPECT_EQ(data_url1, back_entry->GetOriginalRequestURL());
  EXPECT_EQ(data_url1, back_entry->GetURL());

  EXPECT_EQ(data_url1,
            shell()->web_contents()->GetMainFrame()->GetLastCommittedURL());
  EXPECT_EQ(url::Origin::Create(base_url),
            shell()->web_contents()->GetMainFrame()->GetLastCommittedOrigin());
}

IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       CrossDomainResourceRequestLoadDataWithBaseUrl) {
  const GURL base_url("foobar://");
  const GURL history_url("http://historyurl");
  const std::string data = "<html><body></body></html>";
  const GURL data_url = GURL("data:text/html;charset=utf-8," + data);

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // Load data and commit.
  {
    TestNavigationObserver same_tab_observer(shell()->web_contents(), 1);
    shell()->LoadDataWithBaseURL(history_url, data, base_url);
    same_tab_observer.Wait();
    EXPECT_EQ(1, controller.GetEntryCount());
    NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
    EXPECT_EQ(base_url, entry->GetBaseURLForDataURL());
    EXPECT_EQ(history_url, entry->GetVirtualURL());
    EXPECT_EQ(history_url, entry->GetHistoryURLForDataURL());
    EXPECT_EQ(data_url, entry->GetURL());
  }

  // Now make an XHR request and check that the renderer isn't killed.
  std::string script =
      "var url = 'http://www.example.com';\n"
      "var xhr = new XMLHttpRequest();\n"
      "xhr.open('GET', url);\n"
      "xhr.send();\n";
  EXPECT_TRUE(ExecJs(shell()->web_contents(), script));
  // The renderer may not be killed immediately (if it is indeed killed), so
  // reload, block and verify its liveness.
  ReloadBlockUntilNavigationsComplete(shell(), 1);
  EXPECT_TRUE(shell()->web_contents()->GetMainFrame()->IsRenderFrameLive());
}

#if defined(OS_ANDROID)
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       LoadDataWithInvalidBaseURL) {
  const GURL base_url("http://");  // Invalid.
  const GURL history_url("http://historyurl");
  const std::string title = "invalid_base_url";
  const std::string data = base::StringPrintf(
      "<html><head><title>%s</title></head><body>foo</body></html>",
      title.c_str());
  const GURL data_url = GURL("data:text/html;charset=utf-8," + data);

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  TestNavigationObserver same_tab_observer(shell()->web_contents(), 1);
  TitleWatcher title_watcher(shell()->web_contents(), base::UTF8ToUTF16(title));
  shell()->LoadDataAsStringWithBaseURL(history_url, data, base_url);
  same_tab_observer.Wait();
  base::string16 actual_title = title_watcher.WaitAndGetTitle();
  EXPECT_EQ(title, base::UTF16ToUTF8(actual_title));

  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  // What the base URL ends up being is really implementation defined, as
  // using an invalid base URL is already undefined behavior.
  EXPECT_EQ(base_url, entry->GetBaseURLForDataURL());
}
#endif  // defined(OS_ANDROID)

IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       NavigateFromLoadDataWithBaseURL) {
  // LoadDataWithBaseURL is never subject to --site-per-process policy today
  // (this API is only used by Android WebView [where OOPIFs have not shipped
  // yet] and GuestView cases [which always hosts guests inside a renderer
  // without an origin lock]).  Therefore, skip the test in --site-per-process
  // mode to avoid renderer kills which won't happen in practice as described
  // above.
  // TODO(lukasza): https://crbug.com/614463: Consider enabling this test
  // once WebView guests support OOPIFs and/or origin locks.
  if (AreAllSitesIsolatedForTesting())
    return;

  const GURL base_url("http://baseurl");
  const GURL history_url("http://historyurl");
  const std::string data = "<html><body></body></html>";
  const GURL data_url = GURL("data:text/html;charset=utf-8," + data);

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // Load data and commit.
  {
    TestNavigationObserver same_tab_observer(shell()->web_contents(), 1);
    shell()->LoadDataWithBaseURL(history_url, data, base_url);
    same_tab_observer.Wait();
    EXPECT_EQ(1, controller.GetEntryCount());
    NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
    EXPECT_EQ(base_url, entry->GetBaseURLForDataURL());
    EXPECT_EQ(history_url, entry->GetVirtualURL());
    EXPECT_EQ(history_url, entry->GetHistoryURLForDataURL());
    EXPECT_EQ(data_url, entry->GetURL());
  }

  // TODO(boliu): Add test for same document fragment navigation. See
  // crbug.com/561034.

  // Navigate with Javascript.
  {
    GURL navigate_url = embedded_test_server()->base_url();
    std::string script = JsReplace("document.location = $1", navigate_url);
    TestNavigationObserver same_tab_observer(shell()->web_contents(), 1);
    EXPECT_TRUE(ExecJs(shell(), script));
    same_tab_observer.Wait();
    EXPECT_EQ(2, controller.GetEntryCount());
    NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
    EXPECT_TRUE(entry->GetBaseURLForDataURL().is_empty());
    EXPECT_TRUE(entry->GetHistoryURLForDataURL().is_empty());
    EXPECT_EQ(navigate_url, entry->GetVirtualURL());
    EXPECT_EQ(navigate_url, entry->GetURL());
  }
}

IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FragmentNavigateFromLoadDataWithBaseURL) {
  // LoadDataWithBaseURL is never subject to --site-per-process policy today
  // (this API is only used by Android WebView [where OOPIFs have not shipped
  // yet] and GuestView cases [which always hosts guests inside a renderer
  // without an origin lock]).  Therefore, skip the test in --site-per-process
  // mode to avoid renderer kills which won't happen in practice as described
  // above.
  // TODO(lukasza): https://crbug.com/614463: Consider enabling this test
  // once WebView guests support OOPIFs and/or origin locks.
  if (AreAllSitesIsolatedForTesting())
    return;

  const GURL base_url("http://baseurl");
  const GURL history_url("http://historyurl");
  const std::string data =
      "<html><body>"
      "  <p id=\"frag\">"
      "    <a id=\"fraglink\" href=\"#frag\">same document nav</a>"
      "  </p>"
      "</body></html>";

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // Load data and commit.
  TestNavigationObserver same_tab_observer(shell()->web_contents(), 1);
#if defined(OS_ANDROID)
  shell()->LoadDataAsStringWithBaseURL(history_url, data, base_url);
#else
  shell()->LoadDataWithBaseURL(history_url, data, base_url);
#endif
  same_tab_observer.Wait();
  EXPECT_EQ(1, controller.GetEntryCount());
  const GURL data_url = controller.GetLastCommittedEntry()->GetURL();

  // Perform a fragment navigation using a javascript: URL (which doesn't lead
  // to a commit).
  GURL js_url("javascript:document.location = '#frag';");
  EXPECT_FALSE(NavigateToURL(shell(), js_url));
  EXPECT_EQ(2, controller.GetEntryCount());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(base_url, entry->GetBaseURLForDataURL());
  EXPECT_EQ(history_url, entry->GetHistoryURLForDataURL());
  EXPECT_EQ(history_url, entry->GetVirtualURL());
  EXPECT_EQ(data_url, entry->GetURL());

  // Passes if renderer is still alive.
  EXPECT_TRUE(ExecJs(shell(), "console.log('Success');"));
}

IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, UniqueIDs) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_link_to_load_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  ASSERT_EQ(1, controller.GetEntryCount());

  // Use JavaScript to click the link and load the iframe.
  std::string script = "document.getElementById('link').click()";
  EXPECT_TRUE(ExecJs(shell(), script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  ASSERT_EQ(2, controller.GetEntryCount());

  // Unique IDs should... um... be unique.
  ASSERT_NE(controller.GetEntryAtIndex(0)->GetUniqueID(),
            controller.GetEntryAtIndex(1)->GetUniqueID());
}

// Ensures that RenderFrameHosts end up with the correct nav_entry_id() after
// navigations.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, UniqueIDsOnFrames) {
  NavigationController& controller = shell()->web_contents()->GetController();

  // Load a main frame with an about:blank subframe.
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1U, root->child_count());
  ASSERT_NE(nullptr, root->child_at(0));

  // The main frame's nav_entry_id should match the last committed entry.
  int unique_id = controller.GetLastCommittedEntry()->GetUniqueID();
  EXPECT_EQ(unique_id, root->current_frame_host()->nav_entry_id());

  // The about:blank iframe should have inherited the same nav_entry_id.
  EXPECT_EQ(unique_id, root->child_at(0)->current_frame_host()->nav_entry_id());

  // Use NavigateFrameToURL to go cross-site in the subframe.
  GURL foo_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  NavigateFrameToURL(root->child_at(0), foo_url);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  // The unique ID should have stayed the same for the auto-subframe navigation,
  // since the new page replaces the initial about:blank page in the subframe.
  EXPECT_EQ(unique_id, controller.GetLastCommittedEntry()->GetUniqueID());
  EXPECT_EQ(unique_id, root->current_frame_host()->nav_entry_id());
  EXPECT_EQ(unique_id, root->child_at(0)->current_frame_host()->nav_entry_id());

  // Navigating in the subframe again should create a new entry.
  GURL foo_url2(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_2.html"));
  NavigateFrameToURL(root->child_at(0), foo_url2);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  int unique_id2 = controller.GetLastCommittedEntry()->GetUniqueID();
  EXPECT_NE(unique_id, unique_id2);

  // The unique ID should have updated for the current RenderFrameHost in both
  // frames, not just the subframe.
  EXPECT_EQ(unique_id2, root->current_frame_host()->nav_entry_id());
  EXPECT_EQ(unique_id2,
            root->child_at(0)->current_frame_host()->nav_entry_id());
}

// This test used to make sure that a scheme used to prevent spoofs didn't ever
// interfere with navigations. We switched to a different scheme, so now this is
// just a test to make sure we can still navigate once we prune the history
// list.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       DontIgnoreBackAfterNavEntryLimit) {
  NavigationController& controller =
      shell()->web_contents()->GetController();

  const int kMaxEntryCount =
      static_cast<int>(NavigationControllerImpl::max_entry_count());

  // Load up to the max count, all entries should be there.
  for (int url_index = 0; url_index < kMaxEntryCount; ++url_index) {
    GURL url(base::StringPrintf("data:text/html,page%d", url_index));
    EXPECT_TRUE(NavigateToURL(shell(), url));
  }

  EXPECT_EQ(controller.GetEntryCount(), kMaxEntryCount);

  // Navigate twice more more.
  for (int url_index = kMaxEntryCount;
       url_index < kMaxEntryCount + 2; ++url_index) {
    GURL url(base::StringPrintf("data:text/html,page%d", url_index));
    EXPECT_TRUE(NavigateToURL(shell(), url));
  }

  // We expect page0 and page1 to be gone.
  EXPECT_EQ(kMaxEntryCount, controller.GetEntryCount());
  EXPECT_EQ(GURL("data:text/html,page2"),
            controller.GetEntryAtIndex(0)->GetURL());

  // Now try to go back. This should not hang.
  ASSERT_TRUE(controller.CanGoBack());
  controller.GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  // This should have successfully gone back.
  EXPECT_EQ(GURL(base::StringPrintf("data:text/html,page%d", kMaxEntryCount)),
            controller.GetLastCommittedEntry()->GetURL());
}

namespace {

// Does a renderer-initiated location.replace navigation to |url|, replacing the
// current entry.
bool RendererLocationReplace(Shell* shell, const GURL& url) {
  WebContents* web_contents = shell->web_contents();
  WaitForLoadStop(web_contents);
  TestNavigationObserver same_tab_observer(web_contents, 1);
  EXPECT_TRUE(ExecJs(shell, JsReplace("window.location.replace($1)", url)));
  same_tab_observer.Wait();
  if (!IsLastCommittedEntryOfPageType(web_contents, PAGE_TYPE_NORMAL))
    return false;
  return web_contents->GetLastCommittedURL() == url;
}

}  // namespace

// When loading a new page to replace an old page in the history list, make sure
// that the browser and renderer agree, and that both get it right.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       CorrectLengthWithCurrentItemReplacement) {
  NavigationController& controller =
      shell()->web_contents()->GetController();

  EXPECT_TRUE(NavigateToURL(
      shell(), embedded_test_server()->GetURL("/simple_page.html")));
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));

  EXPECT_TRUE(RendererLocationReplace(
      shell(), embedded_test_server()->GetURL("/title1.html")));
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));

  // Now create two more entries and go back, to test replacing an entry without
  // pruning the forward history.
  EXPECT_TRUE(
      NavigateToURL(shell(), embedded_test_server()->GetURL("/title2.html")));
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(2, EvalJs(shell(), "history.length"));

  EXPECT_TRUE(
      NavigateToURL(shell(), embedded_test_server()->GetURL("/title3.html")));
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(3, EvalJs(shell(), "history.length"));

  controller.GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  controller.GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_TRUE(controller.CanGoForward());

  EXPECT_TRUE(RendererLocationReplace(
      shell(), embedded_test_server()->GetURL("/simple_page.html?page1b")));
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(3, EvalJs(shell(), "history.length"));
  EXPECT_TRUE(controller.CanGoForward());

  // Note that there's no way to access the renderer's notion of the history
  // offset via JavaScript. Checking just the history length, though, is enough;
  // if the replacement failed, there would be a new history entry and thus an
  // incorrect length.
}

// When spawning a new page from a WebUI page, make sure that the browser and
// renderer agree about the length of the history list, and that both get it
// right.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       CorrectLengthWithNewTabNavigatingFromWebUI) {
  GURL web_ui_page(std::string(kChromeUIScheme) + "://" +
                   std::string(kChromeUIGpuHost));
  EXPECT_TRUE(NavigateToURL(shell(), web_ui_page));
  EXPECT_EQ(BINDINGS_POLICY_WEB_UI,
            shell()->web_contents()->GetMainFrame()->GetEnabledBindings());

  ShellAddedObserver observer;
  GURL page_url = embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html");
  EXPECT_TRUE(
      ExecJs(shell(), JsReplace("window.open($1, '_blank');", page_url)));
  Shell* shell2 = observer.GetShell();
  EXPECT_TRUE(WaitForLoadStop(shell2->web_contents()));

  EXPECT_EQ(1, shell2->web_contents()->GetController().GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell2, "history.length"));

  // Again, as above, there's no way to access the renderer's notion of the
  // history offset via JavaScript. Checking just the history length, again,
  // will have to suffice.
}

namespace {

class NoNavigationsObserver : public WebContentsObserver {
 public:
  // Observes navigation for the specified |web_contents|.
  explicit NoNavigationsObserver(WebContents* web_contents)
      : WebContentsObserver(web_contents) {}

 private:
  void DidFinishNavigation(NavigationHandle* navigation_handle) override {
    if (!navigation_handle->HasCommitted())
      return;
    FAIL() << "No navigations should occur";
  }
};

class FrameNavigateParamsCapturer : public WebContentsObserver {
 public:
  // Observes navigation for the specified |node|.
  explicit FrameNavigateParamsCapturer(FrameTreeNode* node)
      : WebContentsObserver(
            node->current_frame_host()->delegate()->GetAsWebContents()),
        frame_tree_node_id_(node->frame_tree_node_id()),
        navigations_remaining_(1),
        wait_for_load_(true),
        message_loop_runner_(new MessageLoopRunner) {}

  void set_navigations_remaining(int count) {
    navigations_remaining_ = count;
  }

  void set_wait_for_load(bool ignore) {
    wait_for_load_ = ignore;
  }

  void Wait() {
    message_loop_runner_->Run();
  }

  ui::PageTransition transition() {
    EXPECT_EQ(1U, transitions_.size());
    return transitions_[0];
  }

  NavigationType navigation_type() {
    EXPECT_EQ(1U, navigation_types_.size());
    return navigation_types_[0];
  }

  bool is_same_document() {
    EXPECT_EQ(1U, is_same_documents_.size());
    return is_same_documents_[0];
  }

  bool did_replace_entry() {
    EXPECT_EQ(1U, did_replace_entries_.size());
    return did_replace_entries_[0];
  }

  const std::vector<ui::PageTransition>& transitions() { return transitions_; }
  const std::vector<GURL>& urls() { return urls_; }
  const std::vector<NavigationType>& navigation_types() {
    return navigation_types_;
  }
  const std::vector<bool>& is_same_documents() { return is_same_documents_; }
  const std::vector<bool>& did_replace_entries() {
    return did_replace_entries_;
  }

 private:
  void DidFinishNavigation(NavigationHandle* navigation_handle) override {
    if (!navigation_handle->HasCommitted())
      return;

    if (navigation_handle->GetFrameTreeNodeId() != frame_tree_node_id_)
      return;

    --navigations_remaining_;
    transitions_.push_back(navigation_handle->GetPageTransition());
    urls_.push_back(navigation_handle->GetURL());
    navigation_types_.push_back(
        static_cast<NavigationHandleImpl*>(navigation_handle)
            ->navigation_type());
    is_same_documents_.push_back(navigation_handle->IsSameDocument());
    did_replace_entries_.push_back(navigation_handle->DidReplaceEntry());
    if (!navigations_remaining_ &&
        (!web_contents()->IsLoading() || !wait_for_load_))
      message_loop_runner_->Quit();
  }

  void DidStopLoading() override {
    if (!navigations_remaining_)
      message_loop_runner_->Quit();
  }

  // The id of the FrameTreeNode whose navigations to observe.
  int frame_tree_node_id_;

  // How many navigations remain to capture.
  int navigations_remaining_;

  // Whether to also wait for the load to complete.
  bool wait_for_load_;

  std::vector<ui::PageTransition> transitions_;
  std::vector<GURL> urls_;
  std::vector<NavigationType> navigation_types_;
  std::vector<bool> is_same_documents_;
  std::vector<bool> did_replace_entries_;

  // The MessageLoopRunner used to spin the message loop.
  scoped_refptr<MessageLoopRunner> message_loop_runner_;
};

// Test that going back in a subframe on a loadDataWithBaseURL page doesn't
// crash.  See https://crbug.com/768575.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       NavigateBackInChildOfLoadDataWithBaseURL) {
  // LoadDataWithBaseURL is never subject to --site-per-process policy today
  // (this API is only used by Android WebView [where OOPIFs have not shipped
  // yet] and GuestView cases [which always hosts guests inside a renderer
  // without an origin lock]).  Therefore, skip the test in --site-per-process
  // mode to avoid renderer kills which won't happen in practice as described
  // above.
  // TODO(lukasza): https://crbug.com/614463: Consider enabling this test
  // once WebView guests support OOPIFs and/or origin locks.
  if (AreAllSitesIsolatedForTesting())
    return;

  GURL iframe_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html"));

  const GURL base_url("http://baseurl");
  const GURL history_url("http://historyurl");
  std::string data =
      "<html><body>"
      "  <p>"
      "    <iframe src=\"";
  data += iframe_url.spec();
  data +=
      "\" />"
      "  </p>"
      "</body></html>";

  // Load data and commit.
  TestNavigationObserver same_tab_observer(shell()->web_contents(), 1);
#if defined(OS_ANDROID)
  shell()->LoadDataAsStringWithBaseURL(history_url, data, base_url);
#else
  shell()->LoadDataWithBaseURL(history_url, data, base_url);
#endif
  same_tab_observer.Wait();

  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1u, root->child_count());
  FrameTreeNode* child = root->child_at(0u);

  {
    TestNavigationObserver observer(shell()->web_contents(), 1);
    std::string script = "document.getElementById('thelink').click()";
    EXPECT_TRUE(ExecuteScript(child, script));
    observer.Wait();
  }

  {
    TestNavigationObserver observer(shell()->web_contents(), 1);
    shell()->web_contents()->GetController().GoBack();
    observer.Wait();
  }

  // Passes if renderer is still alive.
  EXPECT_TRUE(ExecuteScript(shell(), "console.log('Success');"));
}

class LoadCommittedCapturer : public WebContentsObserver {
 public:
  // Observes the load commit for the specified |node|.
  explicit LoadCommittedCapturer(FrameTreeNode* node)
      : WebContentsObserver(
            node->current_frame_host()->delegate()->GetAsWebContents()),
        frame_tree_node_id_(node->frame_tree_node_id()),
        message_loop_runner_(new MessageLoopRunner) {}

  // Observes the load commit for the next created frame in the specified
  // |web_contents|.
  explicit LoadCommittedCapturer(WebContents* web_contents)
      : WebContentsObserver(web_contents),
        frame_tree_node_id_(0),
        message_loop_runner_(new MessageLoopRunner) {}

  void Wait() {
    message_loop_runner_->Run();
  }

  ui::PageTransition transition_type() const {
    return transition_type_;
  }

 private:
  void RenderFrameCreated(RenderFrameHost* render_frame_host) override {
    RenderFrameHostImpl* rfh =
        static_cast<RenderFrameHostImpl*>(render_frame_host);

    // Don't pay attention to pending delete RenderFrameHosts in the main frame,
    // which might happen in a race if a cross-process navigation happens
    // quickly.
    if (!rfh->is_active()) {
      DLOG(INFO) << "Skipping pending delete RFH: "
                 << rfh->GetSiteInstance()->GetSiteURL();
      return;
    }

    // If this object was not created with a specified frame tree node, then use
    // the first created active RenderFrameHost.  Once a node is selected, there
    // shouldn't be any other frames being created.
    int frame_tree_node_id = rfh->frame_tree_node()->frame_tree_node_id();
    DCHECK(frame_tree_node_id_ == 0 ||
           frame_tree_node_id_ == frame_tree_node_id);
    frame_tree_node_id_ = frame_tree_node_id;
  }

  void DidFinishNavigation(NavigationHandle* navigation_handle) override {
    if (!navigation_handle->HasCommitted())
      return;

    DCHECK_NE(0, frame_tree_node_id_);
    if (navigation_handle->GetRenderFrameHost()->GetFrameTreeNodeId() !=
            frame_tree_node_id_) {
      return;
    }

    transition_type_ = navigation_handle->GetPageTransition();
    if (!web_contents()->IsLoading())
      message_loop_runner_->Quit();
  }

  void DidStopLoading() override { message_loop_runner_->Quit(); }

  // The id of the FrameTreeNode whose navigations to observe.
  int frame_tree_node_id_;

  // The transition_type of the last navigation.
  ui::PageTransition transition_type_;

  // The MessageLoopRunner used to spin the message loop.
  scoped_refptr<MessageLoopRunner> message_loop_runner_;
};

}  // namespace

// Some pages create a popup, then write an iframe into it. This causes a
// subframe navigation without having any committed entry. Such navigations
// just get thrown on the ground, but we shouldn't crash.
//
// This test actually hits NAVIGATION_TYPE_NAV_IGNORE four times. Two of them,
// the initial window.open() and the iframe creation, don't try to create
// navigation entries, and the third and fourth, the new navigations, try to.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, SubframeOnEmptyPage) {
  // Navigate to a page to force the renderer process to start.
  EXPECT_TRUE(NavigateToURL(shell(), GURL(url::kAboutBlankURL)));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // Pop open a new window with no last committed entry.
  ShellAddedObserver new_shell_observer;
  {
    std::string script = "window.open()";
    EXPECT_TRUE(ExecJs(root, script));
  }
  Shell* new_shell = new_shell_observer.GetShell();
  ASSERT_NE(new_shell->web_contents(), shell()->web_contents());
  FrameTreeNode* new_root =
      static_cast<WebContentsImpl*>(new_shell->web_contents())
          ->GetFrameTree()
          ->root();
  EXPECT_FALSE(
      new_shell->web_contents()->GetController().GetLastCommittedEntry());

  // Make a new iframe in it.
  NoNavigationsObserver observer(new_shell->web_contents());
  {
    LoadCommittedCapturer capturer(new_shell->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = 'data:text/html,<p>some page</p>';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(new_root, script));
    capturer.Wait();
  }
  ASSERT_EQ(1U, new_root->child_count());
  ASSERT_NE(nullptr, new_root->child_at(0));

  // Navigate it cross-site.
  GURL frame_url = embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_2.html");
  {
    LoadCommittedCapturer capturer(new_shell->web_contents());
    std::string script = JsReplace("location.assign($1);", frame_url);
    EXPECT_TRUE(ExecJs(new_root->child_at(0), script));
    capturer.Wait();
  }

  // Success is not crashing, and not navigating.
  EXPECT_EQ(nullptr,
            new_shell->web_contents()->GetController().GetLastCommittedEntry());

  // A nested iframe with a cross-site URL should also be able to commit.
  GURL grandchild_url(embedded_test_server()->GetURL(
      "bar.com", "/navigation_controller/simple_page_1.html"));
  {
    LoadCommittedCapturer capturer(new_shell->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + grandchild_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(new_root->child_at(0), script));
    capturer.Wait();
  }
  ASSERT_EQ(1U, new_root->child_at(0)->child_count());
  EXPECT_EQ(grandchild_url, new_root->child_at(0)->child_at(0)->current_url());
}

// Test that the renderer is not killed after an auto subframe navigation if the
// main frame appears to change its origin due to a document.write on an
// about:blank page.  See https://crbug.com/613732.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       OriginChangeAfterDocumentWrite) {
  GURL url1 = embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html");
  EXPECT_TRUE(NavigateToURL(shell(), url1));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // Pop open a new window to about:blank.
  ShellAddedObserver new_shell_observer;
  EXPECT_TRUE(ExecJs(root, "var w = window.open('about:blank')"));
  Shell* new_shell = new_shell_observer.GetShell();
  ASSERT_NE(new_shell->web_contents(), shell()->web_contents());
  FrameTreeNode* new_root =
      static_cast<WebContentsImpl*>(new_shell->web_contents())
          ->GetFrameTree()
          ->root();
  GURL blank_url(url::kAboutBlankURL);
  EXPECT_EQ(blank_url, new_root->current_url());

  // Make a new iframe in it using document.write from the opener.
  {
    LoadCommittedCapturer capturer(new_shell->web_contents());
    std::string html = "<iframe src='" + url1.spec() + "'></iframe>";
    std::string script = JsReplace(
        "w.document.write($1);"
        "w.document.close();",
        html);
    EXPECT_TRUE(ExecJs(root->current_frame_host(), script));
    capturer.Wait();
  }
  ASSERT_EQ(1U, new_root->child_count());
  EXPECT_EQ(blank_url, new_root->current_url());
  EXPECT_EQ(url1, new_root->child_at(0)->current_url());

  // Navigate the subframe.
  GURL url2 = embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html");
  {
    LoadCommittedCapturer capturer(new_root->child_at(0));
    std::string script = "location.href = '" + url2.spec() + "';";
    EXPECT_TRUE(ExecJs(new_root->child_at(0), script));
    capturer.Wait();
  }
  EXPECT_EQ(blank_url, new_root->current_url());
  EXPECT_EQ(url2, new_root->child_at(0)->current_url());
  EXPECT_EQ(2, new_shell->web_contents()->GetController().GetEntryCount());

  // Do a replace state in the main frame, which changes the URL from
  // about:blank to the opener's origin, due to the document.write() call.
  {
    LoadCommittedCapturer capturer(new_root);
    std::string script = "history.replaceState({}, 'foo', 'foo');";
    EXPECT_TRUE(ExecJs(new_root, script));
    capturer.Wait();
  }
  EXPECT_EQ(embedded_test_server()->GetURL("/navigation_controller/foo"),
            new_root->current_url());
  EXPECT_EQ(url2, new_root->child_at(0)->current_url());

  // Go back in the subframe.  Note that the main frame's URL looks like a
  // cross-origin change from a web URL to about:blank.
  {
    TestNavigationObserver observer(new_shell->web_contents(), 1);
    new_shell->web_contents()->GetController().GoBack();
    observer.Wait();
  }
  EXPECT_TRUE(new_root->current_frame_host()->IsRenderFrameLive());

  // Go forward in the subframe.  Note that the main frame's URL looks like a
  // cross-origin change from about:blank to a web URL.
  {
    TestNavigationObserver observer(new_shell->web_contents(), 1);
    new_shell->web_contents()->GetController().GoForward();
    observer.Wait();
  }
  EXPECT_TRUE(new_root->current_frame_host()->IsRenderFrameLive());
}

IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ErrorPageReplacement) {
  NavigationController& controller = shell()->web_contents()->GetController();
  GURL error_url = embedded_test_server()->GetURL("/close-socket");
  base::PostTaskWithTraits(
      FROM_HERE, {BrowserThread::IO},
      base::BindOnce(&net::URLRequestFailedJob::AddUrlHandler));

  EXPECT_TRUE(NavigateToURL(shell(), GURL(url::kAboutBlankURL)));
  EXPECT_EQ(1, controller.GetEntryCount());

  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  // Navigate to a page that fails to load. It must result in an error page, the
  // NEW_PAGE navigation type, and an addition to the history list.
  {
    FrameNavigateParamsCapturer capturer(root);
    NavigateFrameToURL(root, error_url);
    capturer.Wait();
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    NavigationEntry* entry = controller.GetLastCommittedEntry();
    EXPECT_EQ(PAGE_TYPE_ERROR, entry->GetPageType());
    EXPECT_EQ(2, controller.GetEntryCount());
  }

  // Navigate again to the page that fails to load. It results in an error page,
  // the NEW_PAGE navigation type with replacement, and no addition to the
  // history list.
  {
    FrameNavigateParamsCapturer capturer(root);
    NavigateFrameToURL(root, error_url);
    capturer.Wait();
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.did_replace_entry());
    NavigationEntry* entry = controller.GetLastCommittedEntry();
    EXPECT_EQ(PAGE_TYPE_ERROR, entry->GetPageType());
    EXPECT_EQ(2, controller.GetEntryCount());
  }

  // Make a new entry ...
  EXPECT_TRUE(NavigateToURL(shell(), GURL(url::kAboutBlankURL)));
  EXPECT_EQ(3, controller.GetEntryCount());

  // ... and replace it with a failed load.
  {
    FrameNavigateParamsCapturer capturer(root);
    RendererLocationReplace(shell(), error_url);
    capturer.Wait();
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.did_replace_entry());
    NavigationEntry* entry = controller.GetLastCommittedEntry();
    EXPECT_EQ(PAGE_TYPE_ERROR, entry->GetPageType());
    EXPECT_EQ(3, controller.GetEntryCount());
  }

  // Make a new web ui page to force a process swap ...
  GURL web_ui_page(std::string(kChromeUIScheme) + "://" +
                   std::string(kChromeUIGpuHost));
  EXPECT_TRUE(NavigateToURL(shell(), web_ui_page));
  EXPECT_EQ(4, controller.GetEntryCount());

  // ... and replace it with a failed load. (It is NEW_PAGE for the reason noted
  // above.)
  {
    FrameNavigateParamsCapturer capturer(root);
    RendererLocationReplace(shell(), error_url);
    capturer.Wait();
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.did_replace_entry());
    NavigationEntry* entry = controller.GetLastCommittedEntry();
    EXPECT_EQ(PAGE_TYPE_ERROR, entry->GetPageType());
    EXPECT_EQ(4, controller.GetEntryCount());
  }
}

// Various tests for navigation type classifications. TODO(avi): It's rather
// bogus that the same info is in two different enums; http://crbug.com/453555.

// Verify that navigations for NAVIGATION_TYPE_NEW_PAGE are correctly
// classified.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       NavigationTypeClassification_NewPage) {
  EXPECT_TRUE(NavigateToURL(shell(), GURL(url::kAboutBlankURL)));

  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  {
    // Simple load.
    FrameNavigateParamsCapturer capturer(root);
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/page_with_links.html"));
    NavigateFrameToURL(root, frame_url);
    capturer.Wait();
    // TODO(avi,creis): Why is this (and quite a few others below) a "link"
    // transition? Lots of these transitions should be cleaned up.
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_LINK));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // Load via a fragment link click.
    FrameNavigateParamsCapturer capturer(root);
    std::string script = "document.getElementById('fraglink').click()";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_LINK));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }

  {
    // Load via link click.
    FrameNavigateParamsCapturer capturer(root);
    std::string script = "document.getElementById('thelink').click()";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_LINK));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // location.assign().
    FrameNavigateParamsCapturer capturer(root);
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_2.html"));
    std::string script = JsReplace("location.assign($1);", frame_url);
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_CLIENT_REDIRECT)));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // history.pushState().
    FrameNavigateParamsCapturer capturer(root);
    std::string script =
        "history.pushState({}, 'page 1', 'simple_page_1.html')";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_CLIENT_REDIRECT)));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }

  // location.replace().
  FrameNavigateParamsCapturer capturer(root);
  GURL frame_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  std::string script = JsReplace("location.replace($1);", frame_url);
  EXPECT_TRUE(ExecJs(root, script));
  capturer.Wait();
  EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
      capturer.transition(),
      ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                ui::PAGE_TRANSITION_CLIENT_REDIRECT)));
  EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
  EXPECT_TRUE(capturer.did_replace_entry());
  EXPECT_FALSE(capturer.is_same_document());
}

// Verify that navigations for NAVIGATION_TYPE_EXISTING_PAGE are correctly
// classified.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       NavigationTypeClassification_ExistingPage) {
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url1));
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url2));

  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  {
    // Back from the browser side.
    FrameNavigateParamsCapturer capturer(root);
    shell()->web_contents()->GetController().GoBack();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FORWARD_BACK |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // Forward from the browser side.
    FrameNavigateParamsCapturer capturer(root);
    shell()->web_contents()->GetController().GoForward();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FORWARD_BACK |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // Back from the renderer side.
    FrameNavigateParamsCapturer capturer(root);
    EXPECT_TRUE(ExecJs(root, "history.back()"));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FORWARD_BACK |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // Forward from the renderer side.
    FrameNavigateParamsCapturer capturer(root);
    EXPECT_TRUE(ExecJs(root, "history.forward()"));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FORWARD_BACK |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // Back from the renderer side via history.go().
    FrameNavigateParamsCapturer capturer(root);
    EXPECT_TRUE(ExecJs(root, "history.go(-1)"));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FORWARD_BACK |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // Forward from the renderer side via history.go().
    FrameNavigateParamsCapturer capturer(root);
    EXPECT_TRUE(ExecJs(root, "history.go(1)"));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FORWARD_BACK |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // Reload from the browser side.
    FrameNavigateParamsCapturer capturer(root);
    shell()->web_contents()->GetController().Reload(ReloadType::NORMAL, false);
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_RELOAD));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // Reload from the renderer side.
    FrameNavigateParamsCapturer capturer(root);
    EXPECT_TRUE(ExecJs(root, "location.reload()"));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_CLIENT_REDIRECT)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  {
    // location.replace().
    FrameNavigateParamsCapturer capturer(root);
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_1.html"));
    std::string script = JsReplace("location.replace($1);", frame_url);
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_CLIENT_REDIRECT)));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.did_replace_entry());
    EXPECT_FALSE(capturer.is_same_document());
  }

  // Now, various same document navigations.

  {
    // Same-document location.replace().
    FrameNavigateParamsCapturer capturer(root);
    std::string script = "location.replace('#foo')";
    EXPECT_TRUE(ExecuteScript(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_CLIENT_REDIRECT)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.did_replace_entry());
    EXPECT_TRUE(capturer.is_same_document());
  }

  {
    // history.replaceState().
    FrameNavigateParamsCapturer capturer(root);
    std::string script =
        "history.replaceState({}, 'page 2', 'simple_page_2.html')";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_CLIENT_REDIRECT)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }

  // Back and forward across a fragment navigation.

  GURL url_links(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url_links));
  std::string script = "document.getElementById('fraglink').click()";
  EXPECT_TRUE(ExecJs(root, script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  {
    // Back.
    FrameNavigateParamsCapturer capturer(root);
    shell()->web_contents()->GetController().GoBack();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FORWARD_BACK |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }

  {
    // Forward.
    FrameNavigateParamsCapturer capturer(root);
    shell()->web_contents()->GetController().GoForward();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_FORWARD_BACK)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }

  // Back and forward across a pushState-created navigation.

  EXPECT_TRUE(NavigateToURL(shell(), url1));
  script = "history.pushState({}, 'page 2', 'simple_page_2.html')";
  EXPECT_TRUE(ExecJs(root, script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  {
    // Back.
    FrameNavigateParamsCapturer capturer(root);
    shell()->web_contents()->GetController().GoBack();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FORWARD_BACK |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }

  {
    // Forward.
    FrameNavigateParamsCapturer capturer(root);
    shell()->web_contents()->GetController().GoForward();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_FORWARD_BACK)));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }
}

// Verify that navigations for NAVIGATION_TYPE_SAME_PAGE are correctly
// classified.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       NavigationTypeClassification_SamePage) {
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url1));

  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  {
    // Simple load.
    FrameNavigateParamsCapturer capturer(root);
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_1.html"));
    NavigateFrameToURL(root, frame_url);
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_LINK));
    EXPECT_EQ(NAVIGATION_TYPE_SAME_PAGE, capturer.navigation_type());
  }
}

// Verify that reloading a page with url anchor scrolls to correct position.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, ReloadWithUrlAnchor) {
  GURL url(embedded_test_server()->GetURL(
      "/navigation_controller/reload-with-url-anchor.html#center-element"));
  EXPECT_TRUE(NavigateToURL(shell(), url));

  double window_scroll_y = EvalJs(shell(), "window.scrollY").ExtractDouble();

  // The 'center-element' y-position is 2000px. 2000px is an arbitrary value.
  double expected_window_scroll_y = 2000;
  if (IsUseZoomForDSFEnabled()) {
    float device_scale_factor = shell()
                                    ->web_contents()
                                    ->GetRenderWidgetHostView()
                                    ->GetDeviceScaleFactor();
    expected_window_scroll_y =
        floor(device_scale_factor * expected_window_scroll_y) /
        device_scale_factor;
  }
  EXPECT_FLOAT_EQ(expected_window_scroll_y, window_scroll_y);

  // Reload.
  ReloadBlockUntilNavigationsComplete(shell(), 1);

  window_scroll_y = EvalJs(shell(), "window.scrollY").ExtractDouble();
  EXPECT_FLOAT_EQ(expected_window_scroll_y, window_scroll_y);
}

// Verify that reloading a page with url anchor and scroll scrolls to correct
// position.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ReloadWithUrlAnchorAndScroll) {
  GURL url(embedded_test_server()->GetURL(
      "/navigation_controller/reload-with-url-anchor.html#center-element"));
  EXPECT_TRUE(NavigateToURL(shell(), url));

  // The 'center-element' y-position is 2000px. This script scrolls the view
  // 100px below this element. 2000px and 100px are arbitrary values.
  std::string script_scroll_down = "window.scroll(0, 2100)";
  EXPECT_TRUE(ExecuteScript(shell(), script_scroll_down));

  double window_scroll_y = EvalJs(shell(), "window.scrollY").ExtractDouble();

  double expected_window_scroll_y = 2100;
  if (IsUseZoomForDSFEnabled()) {
    float device_scale_factor = shell()
                                    ->web_contents()
                                    ->GetRenderWidgetHostView()
                                    ->GetDeviceScaleFactor();
    expected_window_scroll_y =
        floor(device_scale_factor * expected_window_scroll_y) /
        device_scale_factor;
  }
  EXPECT_FLOAT_EQ(expected_window_scroll_y, window_scroll_y);

  // Reload.
  ReloadBlockUntilNavigationsComplete(shell(), 1);

  window_scroll_y = EvalJs(shell(), "window.scrollY").ExtractDouble();
  EXPECT_FLOAT_EQ(expected_window_scroll_y, window_scroll_y);
}

// Verify that empty GURL navigations are not classified as SAME_PAGE.
// See https://crbug.com/534980.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       NavigationTypeClassification_EmptyGURL) {
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url1));

  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  {
    // Load an (invalid) empty GURL.  Blink will treat this as an inert commit,
    // but we don't want it to show up as SAME_PAGE.
    FrameNavigateParamsCapturer capturer(root);
    NavigateFrameToURL(root, GURL());
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_LINK));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
  }
}

// Verify that navigations for NAVIGATION_TYPE_NEW_SUBFRAME and
// NAVIGATION_TYPE_AUTO_SUBFRAME are properly classified.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       NavigationTypeClassification_NewAndAutoSubframe) {
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  ASSERT_EQ(1U, root->child_count());
  ASSERT_NE(nullptr, root->child_at(0));

  {
    // Initial load.
    LoadCommittedCapturer capturer(root->child_at(0));
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_1.html"));
    NavigateFrameToURL(root->child_at(0), frame_url);
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  {
    // Simple load.
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_2.html"));
    NavigateFrameToURL(root->child_at(0), frame_url);
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  {
    // Back.
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    shell()->web_contents()->GetController().GoBack();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_AUTO_SUBFRAME, capturer.navigation_type());
  }

  {
    // Forward.
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    shell()->web_contents()->GetController().GoForward();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_AUTO_SUBFRAME, capturer.navigation_type());
  }

  {
    // Simple load.
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/page_with_links.html"));
    NavigateFrameToURL(root->child_at(0), frame_url);
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  {
    // Load via a fragment link click.
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    std::string script = "document.getElementById('fraglink').click()";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  {
    // location.assign().
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_1.html"));
    std::string script = JsReplace("location.assign($1);", frame_url);
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  {
    // location.replace().
    LoadCommittedCapturer capturer(root->child_at(0));
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_2.html"));
    std::string script = JsReplace("location.replace($1);", frame_url);
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  {
    // history.pushState().
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    std::string script =
        "history.pushState({}, 'page 1', 'simple_page_1.html')";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  {
    // history.replaceState().
    LoadCommittedCapturer capturer(root->child_at(0));
    std::string script =
        "history.replaceState({}, 'page 2', 'simple_page_2.html')";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  {
    // Reload.
    LoadCommittedCapturer capturer(root->child_at(0));
    EXPECT_TRUE(ExecJs(root->child_at(0), "location.reload()"));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  {
    // Create an iframe.
    LoadCommittedCapturer capturer(shell()->web_contents());
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_1.html"));
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + frame_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }
}

// Verify that navigations caused by client-side redirects are correctly
// classified.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       NavigationTypeClassification_ClientSideRedirect) {
  EXPECT_TRUE(NavigateToURL(shell(), GURL(url::kAboutBlankURL)));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  {
    // Load the redirecting page.
    FrameNavigateParamsCapturer capturer(root);
    capturer.set_navigations_remaining(2);
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/client_redirect.html"));
    NavigateFrameToURL(root, frame_url);
    capturer.Wait();

    ASSERT_EQ(2U, capturer.transitions().size());
    ASSERT_EQ(2U, capturer.navigation_types().size());
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transitions()[0], ui::PAGE_TRANSITION_LINK));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_types()[0]);
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transitions()[1],
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_CLIENT_REDIRECT)));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_types()[1]);
    EXPECT_TRUE(capturer.did_replace_entries()[1]);
  }
}

// Verify that the LoadCommittedDetails::is_same_document value is properly set
// for non same document navigations.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       LoadCommittedDetails_IsSameDocument) {
  GURL links_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html"));
  EXPECT_TRUE(NavigateToURL(shell(), links_url));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  {
    // Do a fragment link click.
    FrameNavigateParamsCapturer capturer(root);
    std::string script = "document.getElementById('fraglink').click()";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_LINK));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }

  {
    // Do a non-fragment link click.
    FrameNavigateParamsCapturer capturer(root);
    std::string script = "document.getElementById('thelink').click()";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_LINK));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  // Second verse, same as the first. (But in a subframe.)

  GURL iframe_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), iframe_url));

  root = static_cast<WebContentsImpl*>(shell()->web_contents())->
      GetFrameTree()->root();

  ASSERT_EQ(1U, root->child_count());
  ASSERT_NE(nullptr, root->child_at(0));

  NavigateFrameToURL(root->child_at(0), links_url);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  {
    // Do a fragment link click.
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    std::string script = "document.getElementById('fraglink').click()";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }

  {
    // Do a non-fragment link click.
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    std::string script = "document.getElementById('thelink').click()";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }
}

// Verify the tree of FrameNavigationEntries after initial about:blank commits
// in subframes, which should not count as real committed loads.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_BlankAutoSubframe) {
  GURL about_blank_url(url::kAboutBlankURL);
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();
  url::Origin main_origin =
      root->current_frame_host()->GetLastCommittedOrigin();
  EXPECT_EQ(url::Origin::Create(main_url), main_origin);

  // 1. Create a iframe with no URL.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // Check last committed NavigationEntry.
  EXPECT_EQ(1, controller.GetEntryCount());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(main_url, entry->GetURL());
  FrameNavigationEntry* root_entry = entry->root_node()->frame_entry.get();
  EXPECT_EQ(main_url, root_entry->url());
  EXPECT_EQ(main_origin, root_entry->committed_origin());

  // Verify subframe entries.  The entry should now have one blank subframe
  // FrameNavigationEntry, but this does not count as committing a real load.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  FrameNavigationEntry* frame_entry =
      entry->root_node()->children[0]->frame_entry.get();
  EXPECT_EQ(about_blank_url, frame_entry->url());
  EXPECT_EQ(main_origin, frame_entry->committed_origin());
  EXPECT_FALSE(root->child_at(0)->has_committed_real_load());

  // 1a. A nested iframe with no URL should also create a subframe entry but not
  // count as a real load.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // Verify subframe entries.  The nested entry should have one blank subframe
  // FrameNavigationEntry, but this does not count as committing a real load.
  ASSERT_EQ(1U, entry->root_node()->children[0]->children.size());
  frame_entry = entry->root_node()->children[0]->children[0]->frame_entry.get();
  EXPECT_EQ(about_blank_url, frame_entry->url());
  EXPECT_EQ(main_origin, frame_entry->committed_origin());
  EXPECT_FALSE(root->child_at(0)->child_at(0)->has_committed_real_load());

  // 2. Create another iframe with an explicit about:blank URL.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = 'about:blank';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // Check last committed NavigationEntry.
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(entry, controller.GetLastCommittedEntry());

  // Verify subframe entries.  The new entry should have one blank subframe
  // FrameNavigationEntry, but this does not count as committing a real load.
  ASSERT_EQ(2U, entry->root_node()->children.size());
  frame_entry = entry->root_node()->children[1]->frame_entry.get();
  EXPECT_EQ(about_blank_url, frame_entry->url());
  EXPECT_EQ(main_origin, frame_entry->committed_origin());
  EXPECT_FALSE(root->child_at(1)->has_committed_real_load());

  // 3. A real same-site navigation in the nested iframe should be AUTO.
  GURL frame_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  {
    LoadCommittedCapturer capturer(root->child_at(0)->child_at(0));
    std::string script = JsReplace(
        "var frames = document.getElementsByTagName('iframe');"
        "frames[0].src = $1;",
        frame_url);
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // Check last committed NavigationEntry.  It should have replaced the previous
  // frame entry in the original NavigationEntry.
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(entry, controller.GetLastCommittedEntry());

  // The entry should still have one nested subframe FrameNavigationEntry.
  ASSERT_EQ(1U, entry->root_node()->children[0]->children.size());
  frame_entry = entry->root_node()->children[0]->children[0]->frame_entry.get();
  EXPECT_EQ(frame_url, frame_entry->url());
  EXPECT_EQ(url::Origin::Create(frame_url), frame_entry->committed_origin());
  EXPECT_FALSE(root->child_at(0)->has_committed_real_load());
  EXPECT_TRUE(root->child_at(0)->child_at(0)->has_committed_real_load());
  EXPECT_FALSE(root->child_at(1)->has_committed_real_load());

  // 4. A real cross-site navigation in the second iframe should be AUTO.
  GURL foo_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_2.html"));
  {
    LoadCommittedCapturer capturer(root->child_at(1));
    std::string script = JsReplace(
        "var frames = document.getElementsByTagName('iframe');"
        "frames[1].src = $1;",
        foo_url);
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // Check last committed NavigationEntry.
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(entry, controller.GetLastCommittedEntry());

  // The entry should still have two subframe FrameNavigationEntries.
  ASSERT_EQ(2U, entry->root_node()->children.size());
  frame_entry = entry->root_node()->children[1]->frame_entry.get();
  EXPECT_EQ(foo_url, frame_entry->url());
  EXPECT_EQ(url::Origin::Create(foo_url), frame_entry->committed_origin());
  EXPECT_FALSE(root->child_at(0)->has_committed_real_load());
  EXPECT_TRUE(root->child_at(0)->child_at(0)->has_committed_real_load());
  EXPECT_TRUE(root->child_at(1)->has_committed_real_load());
  EXPECT_EQ(frame_entry->committed_origin(),
            root->child_at(1)->current_frame_host()->GetLastCommittedOrigin());

  // 5. A new navigation to about:blank in the nested frame should count as a
  // real load, since that frame has already committed a real load and this is
  // not the initial blank page.
  {
    LoadCommittedCapturer capturer(root->child_at(0)->child_at(0));
    std::string script = "var frames = document.getElementsByTagName('iframe');"
                         "frames[0].src = 'about:blank';";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
  }

  // This should have created a new NavigationEntry.
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_NE(entry, controller.GetLastCommittedEntry());
  NavigationEntryImpl* entry2 = controller.GetLastCommittedEntry();

  // Verify subframe entries.
  ASSERT_EQ(2U, entry->root_node()->children.size());
  frame_entry =
      entry2->root_node()->children[0]->children[0]->frame_entry.get();
  EXPECT_EQ(about_blank_url, frame_entry->url());
  EXPECT_EQ(main_origin, frame_entry->committed_origin());
  EXPECT_FALSE(root->child_at(0)->has_committed_real_load());
  EXPECT_TRUE(root->child_at(0)->child_at(0)->has_committed_real_load());
  EXPECT_TRUE(root->child_at(1)->has_committed_real_load());

  // Check the end result of the frame tree.
  if (AreAllSitesIsolatedForTesting()) {
    FrameTreeVisualizer visualizer;
    EXPECT_EQ(
        " Site A ------------ proxies for B\n"
        "   |--Site A ------- proxies for B\n"
        "   |    +--Site A -- proxies for B\n"
        "   +--Site B ------- proxies for A\n"
        "Where A = http://127.0.0.1/\n"
        "      B = http://foo.com/",
        visualizer.DepictFrameTree(root));
  }
}

// Verify the tree of FrameNavigationEntries when a nested iframe commits inside
// the initial blank page of a loading iframe.  Prevents regression of
// https://crbug.com/600743.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_SlowNestedAutoSubframe) {
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // 1. Create a iframe with a URL that doesn't commit.
  GURL slow_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  TestNavigationManager subframe_delayer(shell()->web_contents(), slow_url);
  std::string script_template =
      "var iframe = document.createElement('iframe');"
      "iframe.src = $1;"
      "document.body.appendChild(iframe);";

  EXPECT_TRUE(ExecJs(root, JsReplace(script_template, slow_url)));
  EXPECT_TRUE(subframe_delayer.WaitForRequestStart());

  // Stop the request so that we can wait for load stop below, without ending up
  // with a commit for this frame.
  shell()->web_contents()->Stop();

  // 2. A nested iframe with a cross-site URL should be able to commit.
  GURL foo_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(ExecJs(root->child_at(0), JsReplace(script_template, foo_url)));
  WaitForLoadStopWithoutSuccessCheck(shell()->web_contents());

  // TODO(creis): Check subframe entries once we create them in this case.
  // See https://crbug.com/608402.
  EXPECT_EQ(foo_url, root->child_at(0)->child_at(0)->current_url());
}

// Verify the tree of FrameNavigationEntries when a nested iframe commits inside
// the initial blank page of an iframe with no committed entry.  Prevents
// regression of https://crbug.com/600743.
// Flaky test: See https://crbug.com/610801
IN_PROC_BROWSER_TEST_F(
    NavigationControllerBrowserTest,
    DISABLED_FrameNavigationEntry_NoCommitNestedAutoSubframe) {
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // 1. Create a iframe with a URL that doesn't commit.
  GURL no_commit_url(embedded_test_server()->GetURL("/nocontent"));
  {
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + no_commit_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
  }
  EXPECT_EQ(GURL(), root->child_at(0)->current_url());

  // 2. A nested iframe with a cross-site URL should be able to commit.
  GURL foo_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + foo_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // TODO(creis): Check subframe entries once we create them in this case.
  // See https://crbug.com/608402.
  EXPECT_EQ(foo_url, root->child_at(0)->child_at(0)->current_url());
}

// Verify the tree of FrameNavigationEntries when a nested iframe commits after
// doing same document back navigation, in which case its parent might not have
// been in the NavigationEntry.  Prevents regression of
// https://crbug.com/600743.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_BackNestedAutoSubframe) {
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // 1. Perform same document navigation.
  {
    FrameNavigateParamsCapturer capturer(root);
    std::string script = "history.pushState({}, 'foo', 'foo')";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }

  // 2. Create an iframe.
  GURL child_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + child_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // 3. Perform back same document navigation.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }

  // 4. A nested iframe with a cross-site URL should be able to commit.
  GURL grandchild_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + grandchild_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // TODO(creis): Check subframe entries once we create them in this case.
  // See https://crbug.com/608402.
  EXPECT_EQ(grandchild_url, root->child_at(0)->child_at(0)->current_url());
}

// Verify the tree of FrameNavigationEntries when a nested iframe commits after
// its parent changes its name, in which case we might not find the parent
// FrameNavigationEntry.  Prevents regression of https://crbug.com/600743.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_RenameNestedAutoSubframe) {
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // 1. Create an iframe.
  GURL child_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + child_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // 2. Change the iframe's name.
  EXPECT_TRUE(ExecJs(root->child_at(0), "window.name = 'foo';"));

  // 3. A nested iframe with a cross-site URL should be able to commit.
  GURL bar_url(embedded_test_server()->GetURL(
      "bar.com", "/navigation_controller/simple_page_1.html"));
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + bar_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));

    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // TODO(creis): Check subframe entries once we create them in this case.
  // See https://crbug.com/608402.
  EXPECT_EQ(bar_url, root->child_at(0)->child_at(0)->current_url());
}

// Verify the tree of FrameNavigationEntries after NAVIGATION_TYPE_AUTO_SUBFRAME
// commits.
// TODO(creis): Test updating entries for history auto subframe navigations.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_AutoSubframe) {
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  // 1. Create a same-site iframe.
  GURL frame_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + frame_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // Check last committed NavigationEntry.
  EXPECT_EQ(1, controller.GetEntryCount());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(main_url, entry->GetURL());
  FrameNavigationEntry* root_entry = entry->root_node()->frame_entry.get();
  EXPECT_EQ(main_url, root_entry->url());
  EXPECT_FALSE(controller.GetPendingEntry());

  // The entry should now have a subframe FrameNavigationEntry.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  FrameNavigationEntry* frame_entry =
      entry->root_node()->children[0]->frame_entry.get();
  EXPECT_EQ(frame_url, frame_entry->url());
  EXPECT_TRUE(root->child_at(0)->has_committed_real_load());

  // 2. Create a second, initially cross-site iframe.
  GURL foo_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + foo_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // The last committed NavigationEntry shouldn't have changed.
  EXPECT_EQ(1, controller.GetEntryCount());
  entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(main_url, entry->GetURL());
  root_entry = entry->root_node()->frame_entry.get();
  EXPECT_EQ(main_url, root_entry->url());
  EXPECT_FALSE(controller.GetPendingEntry());

  // The entry should now have 2 subframe FrameNavigationEntries.
  ASSERT_EQ(2U, entry->root_node()->children.size());
  frame_entry = entry->root_node()->children[1]->frame_entry.get();
  EXPECT_EQ(foo_url, frame_entry->url());
  EXPECT_TRUE(root->child_at(1)->has_committed_real_load());

  // 3. Create a nested iframe in the second subframe.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + foo_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root->child_at(1), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // The last committed NavigationEntry shouldn't have changed.
  EXPECT_EQ(1, controller.GetEntryCount());
  entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(main_url, entry->GetURL());
  root_entry = entry->root_node()->frame_entry.get();
  EXPECT_EQ(main_url, root_entry->url());

  // The entry should now have 2 subframe FrameNavigationEntries.
  ASSERT_EQ(2U, entry->root_node()->children.size());
  ASSERT_EQ(1U, entry->root_node()->children[1]->children.size());
  frame_entry = entry->root_node()->children[1]->children[0]->frame_entry.get();
  EXPECT_EQ(foo_url, frame_entry->url());

  // 4. Create a third iframe on the same site as the second.  This ensures that
  // the commit type is correct even when the subframe process already exists.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + foo_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // The last committed NavigationEntry shouldn't have changed.
  EXPECT_EQ(1, controller.GetEntryCount());
  entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(main_url, entry->GetURL());
  root_entry = entry->root_node()->frame_entry.get();
  EXPECT_EQ(main_url, root_entry->url());

  // The entry should now have 3 subframe FrameNavigationEntries.
  ASSERT_EQ(3U, entry->root_node()->children.size());
  frame_entry = entry->root_node()->children[2]->frame_entry.get();
  EXPECT_EQ(foo_url, frame_entry->url());

  // 5. Create a nested iframe on the original site (A-B-A).
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + frame_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    FrameTreeNode* child = root->child_at(2);
    EXPECT_TRUE(ExecJs(child, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // The last committed NavigationEntry shouldn't have changed.
  EXPECT_EQ(1, controller.GetEntryCount());
  entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(main_url, entry->GetURL());
  root_entry = entry->root_node()->frame_entry.get();
  EXPECT_EQ(main_url, root_entry->url());

  // There should be a corresponding FrameNavigationEntry.
  ASSERT_EQ(1U, entry->root_node()->children[2]->children.size());
  frame_entry = entry->root_node()->children[2]->children[0]->frame_entry.get();
  EXPECT_EQ(frame_url, frame_entry->url());

  // Check the end result of the frame tree.
  if (AreAllSitesIsolatedForTesting()) {
    FrameTreeVisualizer visualizer;
    EXPECT_EQ(
        " Site A ------------ proxies for B\n"
        "   |--Site A ------- proxies for B\n"
        "   |--Site B ------- proxies for A\n"
        "   |    +--Site B -- proxies for A\n"
        "   +--Site B ------- proxies for A\n"
        "        +--Site A -- proxies for B\n"
        "Where A = http://127.0.0.1/\n"
        "      B = http://foo.com/",
        visualizer.DepictFrameTree(root));
  }
}

// Verify the tree of FrameNavigationEntries after NAVIGATION_TYPE_NEW_SUBFRAME
// commits.
// Disabled due to flakes; see https://crbug.com/646836.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_NewSubframe) {
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  // 1. Create a same-site iframe.
  GURL frame_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + frame_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
  }
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();

  // 2. Navigate in the subframe same-site.
  GURL frame_url2(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html"));
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    NavigateFrameToURL(root->child_at(0), frame_url2);
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  // We should have created a new NavigationEntry with the same main frame URL.
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry2 = controller.GetLastCommittedEntry();
  EXPECT_NE(entry, entry2);
  EXPECT_EQ(main_url, entry2->GetURL());
  FrameNavigationEntry* root_entry2 = entry2->root_node()->frame_entry.get();
  EXPECT_EQ(main_url, root_entry2->url());

  // The entry should have a new FrameNavigationEntries for the subframe.
  ASSERT_EQ(1U, entry2->root_node()->children.size());
  EXPECT_EQ(frame_url2, entry2->root_node()->children[0]->frame_entry->url());

  // 3. Create a second, initially cross-site iframe.
  GURL foo_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + foo_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
  }

  // 4. Create a nested same-site iframe in the second subframe, wait for it to
  // commit, then navigate it again cross-site.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + foo_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root->child_at(1), script));
    capturer.Wait();
  }
  GURL bar_url(embedded_test_server()->GetURL(
      "bar.com", "/navigation_controller/simple_page_1.html"));
  {
    FrameNavigateParamsCapturer capturer(root->child_at(1)->child_at(0));
    RenderFrameDeletedObserver deleted_observer(
        root->child_at(1)->child_at(0)->current_frame_host());
    NavigateFrameToURL(root->child_at(1)->child_at(0), bar_url);
    // Wait for the RenderFrame to go away, if this will be cross-process.
    if (AreAllSitesIsolatedForTesting())
      deleted_observer.WaitUntilDeleted();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  // We should have created a new NavigationEntry with the same main frame URL.
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry3 = controller.GetLastCommittedEntry();
  EXPECT_NE(entry, entry3);
  EXPECT_EQ(main_url, entry3->GetURL());
  FrameNavigationEntry* root_entry3 = entry3->root_node()->frame_entry.get();
  EXPECT_EQ(main_url, root_entry3->url());

  // The entry should still have FrameNavigationEntries for all 3 subframes.
  ASSERT_EQ(2U, entry3->root_node()->children.size());
  EXPECT_EQ(frame_url2, entry3->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(foo_url, entry3->root_node()->children[1]->frame_entry->url());
  ASSERT_EQ(1U, entry3->root_node()->children[1]->children.size());
  EXPECT_EQ(bar_url,
            entry3->root_node()->children[1]->children[0]->frame_entry->url());

  // 6. Navigate the second subframe cross-site, clearing its existing subtree.
  GURL baz_url(embedded_test_server()->GetURL(
      "baz.com", "/navigation_controller/simple_page_1.html"));
  {
    FrameNavigateParamsCapturer capturer(root->child_at(1));
    RenderFrameDeletedObserver deleted_observer(
        root->child_at(1)->current_frame_host());
    std::string script = "var frames = document.getElementsByTagName('iframe');"
                         "frames[1].src = '" + baz_url.spec() + "';";
    EXPECT_TRUE(ExecJs(root, script));
    // Wait for the RenderFrame to go away, if this will be cross-process.
    if (AreAllSitesIsolatedForTesting())
      deleted_observer.WaitUntilDeleted();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  // We should have created a new NavigationEntry with the same main frame URL.
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(3, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry4 = controller.GetLastCommittedEntry();
  EXPECT_NE(entry, entry4);
  EXPECT_EQ(main_url, entry4->GetURL());
  FrameNavigationEntry* root_entry4 = entry4->root_node()->frame_entry.get();
  EXPECT_EQ(main_url, root_entry4->url());

  // The entry should still have FrameNavigationEntries for all 3 subframes.
  ASSERT_EQ(2U, entry4->root_node()->children.size());
  EXPECT_EQ(frame_url2, entry4->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(baz_url, entry4->root_node()->children[1]->frame_entry->url());
  ASSERT_EQ(0U, entry4->root_node()->children[1]->children.size());

  // Check the end result of the frame tree.
  if (AreAllSitesIsolatedForTesting()) {
    FrameTreeVisualizer visualizer;
    EXPECT_EQ(
        " Site A ------------ proxies for B\n"
        "   |--Site A ------- proxies for B\n"
        "   +--Site B ------- proxies for A\n"
        "Where A = http://127.0.0.1/\n"
        "      B = http://baz.com/",
        visualizer.DepictFrameTree(root));
  }
}

// Ensure that we don't crash when navigating subframes after same document
// navigations.  See https://crbug.com/522193.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_SubframeAfterSameDocument) {
  // 1. Start on a page with a subframe.
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  ASSERT_EQ(1U, root->child_count());
  ASSERT_NE(nullptr, root->child_at(0));

  // Navigate to a real page in the subframe, so that the next navigation will
  // be MANUAL_SUBFRAME.
  GURL subframe_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  {
    LoadCommittedCapturer capturer(root->child_at(0));
    NavigateFrameToURL(root->child_at(0), subframe_url);
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // 2. Same document navigation in the main frame.
  std::string push_script = "history.pushState({}, 'page 2', 'page_2.html')";
  EXPECT_TRUE(ExecJs(root, push_script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  // The entry should have a FrameNavigationEntry for the subframe.
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  ASSERT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(subframe_url, entry->root_node()->children[0]->frame_entry->url());

  // 3. Add a nested subframe.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + subframe_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // The entry should have a FrameNavigationEntry for the subframe.
  entry = controller.GetLastCommittedEntry();
  ASSERT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(subframe_url, entry->root_node()->children[0]->frame_entry->url());
  ASSERT_EQ(1U, entry->root_node()->children[0]->children.size());
  EXPECT_EQ(subframe_url,
            entry->root_node()->children[0]->children[0]->frame_entry->url());
}

// Verify the tree of FrameNavigationEntries after back/forward navigations in a
// cross-site subframe.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_SubframeBackForward) {
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // 1. Create a same-site iframe.
  GURL frame_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + frame_url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
  }
  NavigationEntryImpl* entry1 = controller.GetLastCommittedEntry();

  // 2. Navigate in the subframe cross-site.
  GURL frame_url2(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/page_with_links.html"));
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    NavigateFrameToURL(root->child_at(0), frame_url2);
    capturer.Wait();
  }
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry2 = controller.GetLastCommittedEntry();

  // 3. Navigate in the subframe cross-site again.
  GURL frame_url3(embedded_test_server()->GetURL(
      "bar.com", "/navigation_controller/page_with_links.html"));
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    NavigateFrameToURL(root->child_at(0), frame_url3);
    capturer.Wait();
  }
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry3 = controller.GetLastCommittedEntry();

  // 4. Go back in the subframe.
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    shell()->web_contents()->GetController().GoBack();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_AUTO_SUBFRAME, capturer.navigation_type());
  }
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry2, controller.GetLastCommittedEntry());

  // The entry should have a FrameNavigationEntry for the subframe.
  ASSERT_EQ(1U, entry2->root_node()->children.size());
  EXPECT_EQ(frame_url2, entry2->root_node()->children[0]->frame_entry->url());

  // 5. Go back in the subframe again to the parent page's site.
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    shell()->web_contents()->GetController().GoBack();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_AUTO_SUBFRAME, capturer.navigation_type());
  }
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry1, controller.GetLastCommittedEntry());

  // The entry should have a FrameNavigationEntry for the subframe.
  ASSERT_EQ(1U, entry1->root_node()->children.size());
  EXPECT_EQ(frame_url, entry1->root_node()->children[0]->frame_entry->url());

  // 6. Go forward in the subframe cross-site.
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    shell()->web_contents()->GetController().GoForward();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_AUTO_SUBFRAME, capturer.navigation_type());
  }
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry2, controller.GetLastCommittedEntry());

  // The entry should have a FrameNavigationEntry for the subframe.
  ASSERT_EQ(1U, entry2->root_node()->children.size());
  EXPECT_EQ(frame_url2, entry2->root_node()->children[0]->frame_entry->url());

  // 7. Go forward in the subframe again, cross-site.
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    shell()->web_contents()->GetController().GoForward();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_AUTO_SUBFRAME, capturer.navigation_type());
  }
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry3, controller.GetLastCommittedEntry());

  // The entry should have a FrameNavigationEntry for the subframe.
  ASSERT_EQ(1U, entry3->root_node()->children.size());
  EXPECT_EQ(frame_url3, entry3->root_node()->children[0]->frame_entry->url());
}

// Verify the tree of FrameNavigationEntries after subframes are recreated in
// history navigations, including nested frames.  The history will look like:
// 1. initial_url
// 2. main_url_a (data_url)
// 3. main_url_a (frame_url_b (data_url))
// 4. main_url_a (frame_url_b (frame_url_c))
// 5. main_url_d
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_RecreatedSubframeBackForward) {
  // 1. Start on a page with no frames.
  GURL initial_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), initial_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  EXPECT_EQ(initial_url, root->current_url());
  NavigationEntryImpl* entry1 = controller.GetLastCommittedEntry();
  EXPECT_EQ(0U, entry1->root_node()->children.size());

  // 2. Navigate to a page with a data URL iframe.
  GURL main_url_a(embedded_test_server()->GetURL(
      "a.com", "/navigation_controller/page_with_data_iframe.html"));
  GURL data_url("data:text/html,Subframe");
  EXPECT_TRUE(NavigateToURL(shell(), main_url_a));
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(0U, root->child_at(0)->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry2 = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the data subframe.
  ASSERT_EQ(1U, entry2->root_node()->children.size());
  EXPECT_EQ(data_url, entry2->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(entry2->root_node()
                ->frame_entry->committed_origin()
                ->GetTupleOrPrecursorTupleIfOpaque(),
            entry2->root_node()
                ->children[0]
                ->frame_entry->committed_origin()
                ->GetTupleOrPrecursorTupleIfOpaque());

  // 3. Navigate the iframe cross-site to a page with a nested iframe.
  GURL frame_url_b(embedded_test_server()->GetURL(
      "b.com", "/navigation_controller/page_with_data_iframe.html"));
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    NavigateFrameToURL(root->child_at(0), frame_url_b);
    capturer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(frame_url_b, root->child_at(0)->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->child_at(0)->current_url());

  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry3 = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the b.com subframe.
  ASSERT_EQ(1U, entry3->root_node()->children.size());
  ASSERT_EQ(1U, entry3->root_node()->children[0]->children.size());
  EXPECT_EQ(frame_url_b, entry3->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(data_url,
            entry3->root_node()->children[0]->children[0]->frame_entry->url());
  EXPECT_EQ(entry3->root_node()
                ->children[0]
                ->frame_entry->committed_origin()
                ->GetTupleOrPrecursorTupleIfOpaque(),
            entry3->root_node()
                ->children[0]
                ->children[0]
                ->frame_entry->committed_origin()
                ->GetTupleOrPrecursorTupleIfOpaque());

  // 4. Navigate the nested iframe cross-site.
  GURL frame_url_c(embedded_test_server()->GetURL(
      "c.com", "/navigation_controller/simple_page_2.html"));
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0)->child_at(0));
    NavigateFrameToURL(root->child_at(0)->child_at(0), frame_url_c);
    capturer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(frame_url_b, root->child_at(0)->current_url());
  EXPECT_EQ(frame_url_c, root->child_at(0)->child_at(0)->current_url());

  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(3, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry4 = controller.GetLastCommittedEntry();

  // The entry should have FrameNavigationEntries for the subframes.
  ASSERT_EQ(1U, entry4->root_node()->children.size());
  ASSERT_EQ(1U, entry4->root_node()->children[0]->children.size());
  EXPECT_EQ(frame_url_b, entry4->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(frame_url_c,
            entry4->root_node()->children[0]->children[0]->frame_entry->url());

  // Remember the DSNs for later.
  int64_t root_dsn =
      entry4->root_node()->frame_entry->document_sequence_number();
  int64_t frame_b_dsn =
      entry4->root_node()->children[0]->frame_entry->document_sequence_number();
  int64_t frame_c_dsn = entry4->root_node()
                            ->children[0]
                            ->children[0]
                            ->frame_entry->document_sequence_number();

  // 5. Navigate main frame cross-site, destroying the frames.
  GURL main_url_d(embedded_test_server()->GetURL(
      "d.com", "/navigation_controller/simple_page_2.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url_d));
  ASSERT_EQ(0U, root->child_count());
  EXPECT_EQ(main_url_d, root->current_url());

  EXPECT_EQ(5, controller.GetEntryCount());
  EXPECT_EQ(4, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry5 = controller.GetLastCommittedEntry();
  EXPECT_EQ(0U, entry5->root_node()->children.size());

  // 6. Go back, recreating the iframe and its nested iframe.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(1U, root->child_at(0)->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(frame_url_b, root->child_at(0)->current_url());
  EXPECT_EQ(frame_url_c, root->child_at(0)->child_at(0)->current_url());

  EXPECT_EQ(5, controller.GetEntryCount());
  EXPECT_EQ(3, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry4, controller.GetLastCommittedEntry());

  // The main frame should not have changed its DSN.
  EXPECT_EQ(root_dsn,
            entry4->root_node()->frame_entry->document_sequence_number());

  // The entry should have FrameNavigationEntries for the subframes.
  ASSERT_EQ(1U, entry4->root_node()->children.size());
  ASSERT_EQ(1U, entry4->root_node()->children[0]->children.size());
  EXPECT_EQ(frame_url_b, entry4->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(frame_url_c,
            entry4->root_node()->children[0]->children[0]->frame_entry->url());
  // The subframes should not have changed their DSNs.
  // See https://crbug.com/628286.
  EXPECT_EQ(frame_b_dsn, entry4->root_node()
                             ->children[0]
                             ->frame_entry->document_sequence_number());
  EXPECT_EQ(frame_c_dsn, entry4->root_node()
                             ->children[0]
                             ->children[0]
                             ->frame_entry->document_sequence_number());

  // Inject a JS value so that we can check for it later.
  EXPECT_TRUE(ExecJs(root, "foo=3;"));

  // 7. Go back again, to the data URL in the nested iframe.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(1U, root->child_at(0)->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(frame_url_b, root->child_at(0)->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->child_at(0)->current_url());

  EXPECT_EQ(5, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry3, controller.GetLastCommittedEntry());

  // The entry should have FrameNavigationEntries for the subframes.
  ASSERT_EQ(1U, entry3->root_node()->children.size());
  ASSERT_EQ(1U, entry3->root_node()->children[0]->children.size());
  EXPECT_EQ(frame_url_b, entry3->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(data_url,
            entry3->root_node()->children[0]->children[0]->frame_entry->url());
  EXPECT_EQ(entry3->root_node()
                ->children[0]
                ->frame_entry->committed_origin()
                ->GetTupleOrPrecursorTupleIfOpaque(),
            entry3->root_node()
                ->children[0]
                ->children[0]
                ->frame_entry->committed_origin()
                ->GetTupleOrPrecursorTupleIfOpaque());

  // Verify that we did not reload the main frame. See https://crbug.com/586234.
  EXPECT_EQ(3, EvalJs(root, "foo"));

  // 8. Go back again, to the data URL in the first subframe.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(0U, root->child_at(0)->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());

  EXPECT_EQ(5, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry2, controller.GetLastCommittedEntry());

  // The entry should have a FrameNavigationEntry for the subframe.
  ASSERT_EQ(1U, entry2->root_node()->children.size());
  EXPECT_EQ(data_url, entry2->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(entry2->root_node()
                ->frame_entry->committed_origin()
                ->GetTupleOrPrecursorTupleIfOpaque(),
            entry2->root_node()
                ->children[0]
                ->frame_entry->committed_origin()
                ->GetTupleOrPrecursorTupleIfOpaque());

  // 9. Go back again, to the initial main frame page.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }
  ASSERT_EQ(0U, root->child_count());
  EXPECT_EQ(initial_url, root->current_url());

  EXPECT_EQ(5, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry1, controller.GetLastCommittedEntry());
  EXPECT_EQ(0U, entry1->root_node()->children.size());

  // 10. Go forward multiple entries and verify the correct subframe URLs load.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoToOffset(2);
    back_load_observer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(frame_url_b, root->child_at(0)->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->child_at(0)->current_url());

  EXPECT_EQ(5, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry3, controller.GetLastCommittedEntry());

  // The entry should have FrameNavigationEntries for the subframes.
  ASSERT_EQ(1U, entry3->root_node()->children.size());
  EXPECT_EQ(frame_url_b, entry3->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(data_url,
            entry3->root_node()->children[0]->children[0]->frame_entry->url());
  EXPECT_EQ(entry3->root_node()
                ->children[0]
                ->frame_entry->committed_origin()
                ->GetTupleOrPrecursorTupleIfOpaque(),
            entry3->root_node()
                ->children[0]
                ->children[0]
                ->frame_entry->committed_origin()
                ->GetTupleOrPrecursorTupleIfOpaque());
}

// Verify that we navigate to the fallback (original) URL if a subframe's
// FrameNavigationEntry can't be found during a history navigation.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_SubframeHistoryFallback) {
  // 1. Start on a page with a data URL iframe.
  GURL main_url_a(embedded_test_server()->GetURL(
      "a.com", "/navigation_controller/page_with_data_iframe.html"));
  GURL data_url("data:text/html,Subframe");
  EXPECT_TRUE(NavigateToURL(shell(), main_url_a));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(0U, root->child_at(0)->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry1 = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the data subframe.
  ASSERT_EQ(1U, entry1->root_node()->children.size());
  EXPECT_EQ(data_url, entry1->root_node()->children[0]->frame_entry->url());

  // 2. Navigate the iframe cross-site.
  GURL frame_url_b(embedded_test_server()->GetURL(
      "b.com", "/navigation_controller/simple_page_1.html"));
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    NavigateFrameToURL(root->child_at(0), frame_url_b);
    capturer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(frame_url_b, root->child_at(0)->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry2 = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the b.com subframe.
  ASSERT_EQ(1U, entry2->root_node()->children.size());
  EXPECT_EQ(frame_url_b, entry2->root_node()->children[0]->frame_entry->url());

  // 3. Navigate main frame cross-site, destroying the frames.
  GURL main_url_c(embedded_test_server()->GetURL(
      "c.com", "/navigation_controller/simple_page_2.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url_c));
  ASSERT_EQ(0U, root->child_count());
  EXPECT_EQ(main_url_c, root->current_url());

  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry3 = controller.GetLastCommittedEntry();
  EXPECT_EQ(0U, entry3->root_node()->children.size());

  // Force the subframe entry to have the wrong name, so that it isn't found
  // when we go back.
  entry2->root_node()->children[0]->frame_entry->set_frame_unique_name("wrong");

  // 4. Go back, recreating the iframe. The subframe entry won't be found, and
  // we should fall back to the default URL.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());

  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry2, controller.GetLastCommittedEntry());

  // The entry should have both the stale FrameNavigationEntry with the old
  // name and the new FrameNavigationEntry for the fallback navigation.
  ASSERT_EQ(2U, entry2->root_node()->children.size());
  EXPECT_EQ(frame_url_b, entry2->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(data_url, entry2->root_node()->children[1]->frame_entry->url());
}

// Allows waiting until an URL with a data scheme commits in any frame.
class DataUrlCommitObserver : public WebContentsObserver {
 public:
  explicit DataUrlCommitObserver(WebContents* web_contents)
      : WebContentsObserver(web_contents),
        message_loop_runner_(new MessageLoopRunner) {}

  void Wait() { message_loop_runner_->Run(); }

 private:
  void DidFinishNavigation(NavigationHandle* navigation_handle) override {
    if (navigation_handle->HasCommitted() &&
        !navigation_handle->IsErrorPage() &&
        navigation_handle->GetURL().scheme() == "data")
      message_loop_runner_->Quit();
  }

  // The MessageLoopRunner used to spin the message loop.
  scoped_refptr<MessageLoopRunner> message_loop_runner_;
};

// Verify that dynamically generated iframes load properly during a history
// navigation if no history item can be found for them.
// See https://crbug.com/649345.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_DynamicSubframeHistoryFallback) {
  // 1. Start on a page with a script-generated iframe.  The iframe has a
  // dynamic name, starts at about:blank, and gets navigated to a dynamic data
  // URL as the page is loading.
  GURL main_url_a(embedded_test_server()->GetURL(
      "a.com", "/navigation_controller/dynamic_iframe.html"));
  {
    // Wait until the data URL has committed, even if load stop happens after
    // about:blank load.
    DataUrlCommitObserver data_observer(shell()->web_contents());
    EXPECT_TRUE(NavigateToURL(shell(), main_url_a));
    data_observer.Wait();
  }
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(0U, root->child_at(0)->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ("data", root->child_at(0)->current_url().scheme());

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry1 = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the data subframe.
  ASSERT_EQ(1U, entry1->root_node()->children.size());
  EXPECT_EQ("data",
            entry1->root_node()->children[0]->frame_entry->url().scheme());

  // 2. Navigate main frame cross-site, destroying the frames.
  GURL main_url_b(embedded_test_server()->GetURL(
      "b.com", "/navigation_controller/simple_page_2.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url_b));
  ASSERT_EQ(0U, root->child_count());
  EXPECT_EQ(main_url_b, root->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry2 = controller.GetLastCommittedEntry();
  EXPECT_EQ(0U, entry2->root_node()->children.size());

  // 3. Go back, recreating the iframe.  The subframe will have a new name this
  // time, so we won't find a history item for it.  We should let the new data
  // URL be loaded into it, rather than clobbering it with an about:blank page.
  {
    // Wait until the data URL has committed, even if load stop happens first.
    DataUrlCommitObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ("data", root->child_at(0)->current_url().scheme());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry1, controller.GetLastCommittedEntry());

  // There should be only 1 FNE, because when the child frame is dynamically
  // created or recreated from javascript, it's FNE will be removed when the
  // frame is removed.
  ASSERT_EQ(1U, entry1->root_node()->children.size());
  EXPECT_EQ("data",
            entry1->root_node()->children[0]->frame_entry->url().scheme());

  // The iframe commit should have been classified AUTO_SUBFRAME and not
  // NEW_SUBFRAME, so we should still be able to go forward.
  EXPECT_TRUE(shell()->web_contents()->GetController().CanGoForward());
}

// Verify that we don't clobber any content injected into the initial blank page
// if we go back to an about:blank subframe.  See https://crbug.com/626416.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_RecreatedBlankSubframe) {
  // 1. Start on a page that injects content into an about:blank iframe.
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/inject_into_blank_iframe.html"));
  GURL blank_url(url::kAboutBlankURL);
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(0U, root->child_at(0)->child_count());
  EXPECT_EQ(main_url, root->current_url());
  EXPECT_EQ(blank_url, root->child_at(0)->current_url());

  // Verify that the parent was able to script the iframe.
  EXPECT_EQ("Injected text",
            EvalJs(root->child_at(0), "document.body.innerHTML"));

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the blank subframe.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(blank_url, entry->root_node()->children[0]->frame_entry->url());

  // 2. Navigate the main frame, destroying the frames.
  GURL main_url_2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url_2));
  ASSERT_EQ(0U, root->child_count());
  EXPECT_EQ(main_url_2, root->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // 3. Go back, recreating the iframe.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    controller.GoBack();
    back_load_observer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url, root->current_url());
  EXPECT_EQ(blank_url, root->child_at(0)->current_url());

  // Verify that the parent was able to script the iframe.
  EXPECT_EQ("Injected text",
            EvalJs(root->child_at(0), "document.body.innerHTML"));

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry, controller.GetLastCommittedEntry());

  // The entry should have a FrameNavigationEntry for the blank subframe.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(blank_url, entry->root_node()->children[0]->frame_entry->url());
}

// Verify that we correctly load nested iframes injected into a page if we go
// back and recreate them.  Also confirm that form values are not restored for
// forms injected into about:blank pages.  See https://crbug.com/657896.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_RecreatedInjectedBlankSubframe) {
  // 1. Start on a page that injects a nested iframe into an injected
  // about:blank iframe.
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/inject_subframe_into_blank_iframe.html"));
  GURL blank_url(url::kAboutBlankURL);
  GURL inner_url(
      embedded_test_server()->GetURL("/navigation_controller/form.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // Verify that the inner iframe was able to load.
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(1U, root->child_at(0)->child_count());
  ASSERT_EQ(0U, root->child_at(0)->child_at(0)->child_count());
  EXPECT_EQ(main_url, root->current_url());
  EXPECT_EQ(blank_url, root->child_at(0)->current_url());
  EXPECT_EQ(inner_url, root->child_at(0)->child_at(0)->current_url());

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();

  // The entry should have FrameNavigationEntries for the subframes.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(blank_url, entry->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(inner_url,
            entry->root_node()->children[0]->children[0]->frame_entry->url());

  // Set a value in the form which will be stored in the PageState.
  EXPECT_TRUE(ExecJs(root->child_at(0)->child_at(0),
                     "document.getElementById('itext').value = 'modified';"));

  // 2. Navigate the main frame same-site, destroying the subframes.
  GURL main_url_2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url_2));
  ASSERT_EQ(0U, root->child_count());
  EXPECT_EQ(main_url_2, root->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // 3. Go back, recreating the subframes.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    controller.GoBack();
    back_load_observer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url, root->current_url());
  EXPECT_EQ(blank_url, root->child_at(0)->current_url());

  // Verify that the inner iframe went to the correct URL.
  EXPECT_EQ(inner_url, root->child_at(0)->child_at(0)->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry, controller.GetLastCommittedEntry());

  // There is only 1 child frame in the frame tree and only 1 FNE, because when
  // the child frame is dynamically created or recreated from javascript, it's
  // FNE will be removed when the frame is removed.
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(1U, entry->root_node()->children.size());

  // The entry should have FrameNavigationEntries for the subframes.
  EXPECT_EQ(blank_url, entry->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(inner_url,
            entry->root_node()->children[0]->children[0]->frame_entry->url());

  // With injected about:blank iframes, we never restore form values from
  // PageState.
  EXPECT_EQ("", EvalJs(root->child_at(0)->child_at(0),
                       "document.getElementById('itext').value"));
}

// Verify that we correctly load a nested iframe created by an injected iframe
// srcdoc if we go back and recreate the frames.
//
// This test is similar to
// NavigationControllerBrowserTest.FrameNavigationEntry_RecreatedInjectedBlankSubframe
// and RenderFrameHostManagerTest.RestoreSubframeFileAccessForHistoryNavigation.
//
// This test worked before and after the fix for https://crbug.com/657896, but
// it failed with a preliminary version of the fix (see also
// https://crbug.com/657896#c9).
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_RecreatedInjectedSrcdocSubframe) {
  // 1. Start on a page that injects a nested iframe srcdoc which contains a
  // nested iframe.
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/inject_iframe_srcdoc_with_nested_frame.html"));
  GURL srcdoc_url(content::kAboutSrcDocURL);
  GURL inner_url(
      embedded_test_server()->GetURL("/navigation_controller/form.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // Verify that the inner iframe was able to load.
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(1U, root->child_at(0)->child_count());
  ASSERT_EQ(0U, root->child_at(0)->child_at(0)->child_count());
  EXPECT_EQ(main_url, root->current_url());
  EXPECT_EQ(srcdoc_url, root->child_at(0)->current_url());
  EXPECT_EQ(inner_url, root->child_at(0)->child_at(0)->current_url());

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();

  // The entry should have FrameNavigationEntries for the subframes.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(srcdoc_url, entry->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(inner_url,
            entry->root_node()->children[0]->children[0]->frame_entry->url());

  // Set a value in the form which will be stored in the PageState.
  EXPECT_TRUE(ExecJs(root->child_at(0)->child_at(0),
                     "document.getElementById('itext').value = 'modified';"));

  // 2. Navigate the main frame same-site, destroying the subframes.
  GURL main_url_2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url_2));
  ASSERT_EQ(0U, root->child_count());
  EXPECT_EQ(main_url_2, root->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // 3. Go back, recreating the subframes.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    controller.GoBack();
    back_load_observer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(1U, root->child_at(0)->child_count());
  ASSERT_EQ(0U, root->child_at(0)->child_at(0)->child_count());
  EXPECT_EQ(main_url, root->current_url());
  EXPECT_EQ(srcdoc_url, root->child_at(0)->current_url());

  // Verify that the inner iframe went to the correct URL.
  EXPECT_EQ(inner_url, root->child_at(0)->child_at(0)->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry, controller.GetLastCommittedEntry());

  // There is only 1 child frame in the frame tree and only 1 FNE, because when
  // the child frame is dynamically created or recreated from javascript, it's
  // FNE will be removed when the frame is removed.
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(1U, entry->root_node()->children.size());

  // The entry should have FrameNavigationEntries for the subframes.
  EXPECT_EQ(srcdoc_url, entry->root_node()->children[0]->frame_entry->url());
  EXPECT_EQ(inner_url,
            entry->root_node()->children[0]->children[0]->frame_entry->url());

  // With *injected* iframe srcdoc pages, we don't restore form values from
  // PageState (because iframes injected by javascript always get a fresh,
  // random unique name each time they are created or recreated - see
  // https://crbug.com/500260).
  //
  // Note that restoring form values in srcdoc frames created via static html is
  // expected to work and is tested by
  // RenderFrameHostManagerTest.RestoreSubframeFileAccessForHistoryNavigation.
  EXPECT_EQ("", EvalJs(root->child_at(0)->child_at(0),
                       "document.getElementById('itext').value"));
}

// Verify that we can load about:blank in an iframe when going back to a page,
// if that iframe did not originally have about:blank in it.  See
// https://crbug.com/657896.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_RecreatedSubframeToBlank) {
  // 1. Start on a page with a data iframe.
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_data_iframe.html"));
  GURL data_url("data:text/html,Subframe");
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(0U, root->child_at(0)->child_count());
  EXPECT_EQ(main_url, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());

  // 2. Navigate the subframe to about:blank.
  GURL blank_url(url::kAboutBlankURL);
  NavigateFrameToURL(root->child_at(0), blank_url);
  EXPECT_EQ(blank_url, root->child_at(0)->current_url());
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the blank subframe.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(blank_url, entry->root_node()->children[0]->frame_entry->url());

  // 3. Navigate the main frame, destroying the frames.
  GURL main_url_2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url_2));
  ASSERT_EQ(0U, root->child_count());
  EXPECT_EQ(main_url_2, root->current_url());

  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());

  // 3. Go back, recreating the iframe.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    controller.GoBack();
    back_load_observer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url, root->current_url());
  EXPECT_EQ(blank_url, root->child_at(0)->current_url());

  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry, controller.GetLastCommittedEntry());

  // The entry should have a FrameNavigationEntry for the blank subframe.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(blank_url, entry->root_node()->children[0]->frame_entry->url());
}

// Ensure we don't crash if an onload handler removes an about:blank frame after
// recreating it on a back/forward.  See https://crbug.com/638166.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_RemoveRecreatedBlankSubframe) {
  // 1. Start on a page that removes its about:blank iframe during onload.
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/remove_blank_iframe_on_load.html"));
  GURL blank_url(url::kAboutBlankURL);
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  EXPECT_EQ(main_url, root->current_url());

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the blank subframe, even
  // though it is being removed from the page.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(blank_url, entry->root_node()->children[0]->frame_entry->url());

  // 2. Navigate the main frame, destroying the frames.
  GURL main_url_2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url_2));
  ASSERT_EQ(0U, root->child_count());
  EXPECT_EQ(main_url_2, root->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // 3. Go back, recreating the iframe (and removing it again).
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    controller.GoBack();
    back_load_observer.Wait();
  }
  EXPECT_EQ(main_url, root->current_url());

  // Check that the renderer is still alive.
  EXPECT_TRUE(ExecJs(shell(), "console.log('Success');"));

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(entry, controller.GetLastCommittedEntry());

  // The entry should have a FrameNavigationEntry for the blank subframe.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(blank_url, entry->root_node()->children[0]->frame_entry->url());
}

// Verifies that we clear the children FrameNavigationEntries if a history
// navigation redirects, so that we don't try to load previous history items in
// frames of the new page.  This should only clear the children of the frame
// that is redirecting.  See https://crbug.com/585194.
//
// Specifically, this test covers the following interesting cases:
// - Subframe redirect when going back from a different main frame (step 4).
// - Subframe redirect without changing the main frame (step 6).
// - Main frame redirect, clearing the children (step 8).
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_BackWithRedirect) {
  // 1. Start on a page with two frames.
  GURL initial_url(
      embedded_test_server()->GetURL("/frame_tree/page_with_two_frames.html"));
  EXPECT_TRUE(NavigateToURL(shell(), initial_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  EXPECT_EQ(initial_url, root->current_url());
  EXPECT_EQ(2U, root->child_count());
  NavigationEntryImpl* entry1 = controller.GetLastCommittedEntry();
  EXPECT_EQ(2U, entry1->root_node()->children.size());

  // 2. Navigate both iframes to a page with a nested iframe.
  GURL frame_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/page_with_data_iframe.html"));
  GURL data_url("data:text/html,Subframe");
  NavigateFrameToURL(root->child_at(0), frame_url);
  NavigateFrameToURL(root->child_at(1), frame_url);
  EXPECT_EQ(initial_url, root->current_url());
  EXPECT_EQ(frame_url, root->child_at(0)->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->child_at(0)->current_url());
  EXPECT_EQ(frame_url, root->child_at(1)->current_url());
  EXPECT_EQ(data_url, root->child_at(1)->child_at(0)->current_url());

  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry2 = controller.GetLastCommittedEntry();

  // Verify subframe entries.
  NavigationEntryImpl::TreeNode* root_node = entry2->root_node();
  ASSERT_EQ(2U, root_node->children.size());
  EXPECT_EQ(frame_url, root_node->children[0]->frame_entry->url());
  EXPECT_EQ(data_url, root_node->children[0]->children[0]->frame_entry->url());
  EXPECT_EQ(frame_url, root_node->children[1]->frame_entry->url());
  EXPECT_EQ(data_url, root_node->children[1]->children[0]->frame_entry->url());

  // Cause the first iframe to redirect when we come back later.  It will go
  // cross-site to a page with an about:blank iframe.
  GURL frame_redirect_dest_url(embedded_test_server()->GetURL(
      "bar.com", "/navigation_controller/page_with_iframe.html"));
  GURL blank_url(url::kAboutBlankURL);
  {
    TestNavigationObserver observer(shell()->web_contents());
    std::string script = "history.replaceState({}, '', '/server-redirect?" +
                         frame_redirect_dest_url.spec() + "')";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    observer.Wait();
  }

  // We should not have lost subframe entries for the nested frame.
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  FrameNavigationEntry* nested_entry =
      entry2->GetFrameEntry(root->child_at(0)->child_at(0));
  EXPECT_TRUE(nested_entry);
  EXPECT_EQ(data_url, nested_entry->url());

  // 3. Navigate the main frame to a different page.  When we come back, we'll
  // commit the main frame first and have no pending entry when navigating the
  // subframes.
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url2));
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(3, controller.GetLastCommittedEntryIndex());

  // 4. Go back. The first iframe should redirect to a cross-site page with a
  // different nested iframe.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }
  EXPECT_EQ(initial_url, root->current_url());
  EXPECT_EQ(frame_redirect_dest_url, root->child_at(0)->current_url());
  EXPECT_EQ(blank_url, root->child_at(0)->child_at(0)->current_url());
  EXPECT_EQ(frame_url, root->child_at(1)->current_url());
  EXPECT_EQ(data_url, root->child_at(1)->child_at(0)->current_url());

  // Check the FrameNavigationEntries as well.
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(frame_redirect_dest_url,
            entry2->GetFrameEntry(root->child_at(0))->url());
  EXPECT_EQ(blank_url,
            entry2->GetFrameEntry(root->child_at(0)->child_at(0))->url());
  EXPECT_EQ(frame_url, entry2->GetFrameEntry(root->child_at(1))->url());
  EXPECT_EQ(data_url,
            entry2->GetFrameEntry(root->child_at(1)->child_at(0))->url());

  // In --site-per-process, we're misclassifying the subframe redirect in step 6
  // below.  For now, skip the rest of the test in that mode.
  // TODO(creis): Fix this in https://crbug.com/628782.
  if (AreAllSitesIsolatedForTesting())
    return;

  // Now cause the second iframe to redirect when we come back to it.
  {
    TestNavigationObserver observer(shell()->web_contents());
    std::string script = "history.replaceState({}, '', '/server-redirect?" +
                         frame_redirect_dest_url.spec() + "')";
    EXPECT_TRUE(ExecJs(root->child_at(1), script));
    observer.Wait();
  }

  // 5. Navigate the other iframe elsewhere, so that going back does not
  // require a navigation in the main frame.  This means there will be a
  // pending entry when the subframe commits, exercising a different path than
  // step 4.
  {
    FrameNavigateParamsCapturer capturer(root->child_at(1));
    NavigateFrameToURL(root->child_at(1), url2);
    capturer.Wait();
  }
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(3, controller.GetLastCommittedEntryIndex());

  // 6. As in step 4, go back but redirect, resetting the children.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }
  EXPECT_EQ(initial_url, root->current_url());
  EXPECT_EQ(frame_redirect_dest_url, root->child_at(0)->current_url());
  EXPECT_EQ(blank_url, root->child_at(0)->child_at(0)->current_url());
  EXPECT_EQ(frame_redirect_dest_url, root->child_at(1)->current_url());
  EXPECT_EQ(blank_url, root->child_at(1)->child_at(0)->current_url());

  // Check the FrameNavigationEntries as well.
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(frame_redirect_dest_url,
            entry2->GetFrameEntry(root->child_at(0))->url());
  EXPECT_EQ(blank_url,
            entry2->GetFrameEntry(root->child_at(0)->child_at(0))->url());
  EXPECT_EQ(frame_redirect_dest_url,
            entry2->GetFrameEntry(root->child_at(1))->url());
  EXPECT_EQ(blank_url,
            entry2->GetFrameEntry(root->child_at(1)->child_at(0))->url());

  // Now cause the main frame to redirect to a page with no frames when we come
  // back to it.
  GURL redirect_dest_url(embedded_test_server()->GetURL(
      "bar.com", "/navigation_controller/simple_page_2.html"));
  {
    TestNavigationObserver observer(shell()->web_contents());
    std::string script = "history.replaceState({}, '', '/server-redirect?" +
                         redirect_dest_url.spec() + "')";
    EXPECT_TRUE(ExecJs(root, script));
    observer.Wait();
  }

  // 7. Navigate the main frame to a different page.
  EXPECT_TRUE(NavigateToURL(shell(), url2));
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(3, controller.GetLastCommittedEntryIndex());

  // 8. Go back, causing the main frame to redirect to a page with no frames.
  // All child items should be gone.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }
  EXPECT_EQ(redirect_dest_url, root->current_url());
  EXPECT_EQ(0U, root->child_count());
  EXPECT_EQ(0U, entry2->root_node()->children.size());
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
}

// Similar to FrameNavigationEntry_BackWithRedirect but with same-origin frames.
// (This wasn't working initially).
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_SameOriginBackWithRedirect) {
  // 1. Start on a page with an iframe.
  GURL initial_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_data_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), initial_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  EXPECT_EQ(initial_url, root->current_url());
  EXPECT_EQ(1U, root->child_count());
  NavigationEntryImpl* entry1 = controller.GetLastCommittedEntry();
  EXPECT_EQ(1U, entry1->root_node()->children.size());

  // 2. Navigate the iframe to a page with a nested iframe.
  GURL frame_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_data_iframe.html"));
  GURL data_url("data:text/html,Subframe");
  NavigateFrameToURL(root->child_at(0), frame_url);
  EXPECT_EQ(initial_url, root->current_url());
  EXPECT_EQ(frame_url, root->child_at(0)->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->child_at(0)->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry2 = controller.GetLastCommittedEntry();

  // Verify subframe entries.
  NavigationEntryImpl::TreeNode* root_node = entry2->root_node();
  ASSERT_EQ(1U, root_node->children.size());
  EXPECT_EQ(frame_url, root_node->children[0]->frame_entry->url());
  EXPECT_EQ(data_url, root_node->children[0]->children[0]->frame_entry->url());

  // Cause the iframe to redirect when we come back later.  It will go
  // same-origin to a page with an about:blank iframe.
  GURL frame_redirect_dest_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe.html"));
  {
    TestNavigationObserver observer(shell()->web_contents());
    std::string script = "history.replaceState({}, '', '/server-redirect?" +
                         frame_redirect_dest_url.spec() + "')";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    observer.Wait();
  }

  // We should not have lost subframe entries for the nested frame.
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  FrameNavigationEntry* nested_entry =
      entry2->GetFrameEntry(root->child_at(0)->child_at(0));
  EXPECT_TRUE(nested_entry);
  EXPECT_EQ(data_url, nested_entry->url());

  // 3. Navigate the main frame to a different page.  When we come back, we'll
  // commit the main frame first and have no pending entry when navigating the
  // subframes.
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url2));
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());

  // 4. Go back. The first iframe should redirect to a same-origin page with a
  // different nested iframe.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    controller.GoBack();
    back_load_observer.Wait();
  }
  GURL blank_url(url::kAboutBlankURL);
  EXPECT_EQ(initial_url, root->current_url());
  EXPECT_EQ(frame_redirect_dest_url, root->child_at(0)->current_url());
  EXPECT_EQ(blank_url, root->child_at(0)->child_at(0)->current_url());

  // Check the FrameNavigationEntries as well.
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(frame_redirect_dest_url,
            entry2->GetFrameEntry(root->child_at(0))->url());
  EXPECT_EQ(blank_url,
            entry2->GetFrameEntry(root->child_at(0)->child_at(0))->url());

  // Now cause the main frame to redirect to a page with no frames when we come
  // back to it.
  GURL redirect_dest_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  {
    TestNavigationObserver observer(shell()->web_contents());
    std::string script = "history.replaceState({}, '', '/server-redirect?" +
                         redirect_dest_url.spec() + "')";
    EXPECT_TRUE(ExecJs(root, script));
    observer.Wait();
  }

  // 5. Navigate the main frame to a different page.
  EXPECT_TRUE(NavigateToURL(shell(), url2));
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());

  // 6. Go back, causing the main frame to redirect to a page with no frames.
  // All child items should be gone.
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    controller.GoBack();
    back_load_observer.Wait();
  }
  EXPECT_EQ(redirect_dest_url, root->current_url());
  EXPECT_EQ(0U, root->child_count());
  EXPECT_EQ(0U, entry2->root_node()->children.size());
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
}

// Verify that subframes can be restored in a new NavigationController using the
// PageState of an existing NavigationEntry.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_RestoreViaPageState) {
  // 1. Start on a page with a data URL iframe.
  GURL main_url_a(embedded_test_server()->GetURL(
      "a.com", "/navigation_controller/page_with_data_iframe.html"));
  GURL data_url("data:text/html,Subframe");
  EXPECT_TRUE(NavigateToURL(shell(), main_url_a));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1U, root->child_count());
  ASSERT_EQ(0U, root->child_at(0)->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry1 = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the data subframe.
  ASSERT_EQ(1U, entry1->root_node()->children.size());
  EXPECT_EQ(data_url, entry1->root_node()->children[0]->frame_entry->url());

  // 2. Navigate the iframe cross-site.
  GURL frame_url_b(embedded_test_server()->GetURL(
      "b.com", "/navigation_controller/simple_page_1.html"));
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    NavigateFrameToURL(root->child_at(0), frame_url_b);
    capturer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(frame_url_b, root->child_at(0)->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry2 = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the b.com subframe.
  ASSERT_EQ(1U, entry2->root_node()->children.size());
  EXPECT_EQ(frame_url_b, entry2->root_node()->children[0]->frame_entry->url());

  // 3. Navigate main frame cross-site, destroying the frames.
  GURL main_url_c(embedded_test_server()->GetURL(
      "c.com", "/navigation_controller/simple_page_2.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url_c));
  ASSERT_EQ(0U, root->child_count());
  EXPECT_EQ(main_url_c, root->current_url());

  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry3 = controller.GetLastCommittedEntry();
  EXPECT_EQ(0U, entry3->root_node()->children.size());

  // 4. Create a NavigationEntry with the same PageState as |entry2| and verify
  // it has the same FrameNavigationEntry structure.
  std::unique_ptr<NavigationEntryImpl> restored_entry =
      NavigationEntryImpl::FromNavigationEntry(
          NavigationController::CreateNavigationEntry(
              main_url_a, Referrer(), ui::PAGE_TRANSITION_RELOAD, false,
              std::string(), controller.GetBrowserContext(),
              nullptr /* blob_url_loader_factory */));
  EXPECT_EQ(0U, restored_entry->root_node()->children.size());
  restored_entry->SetPageState(entry2->GetPageState());

  // The entry should have a FrameNavigationEntry for the b.com subframe.
  EXPECT_EQ(main_url_a, restored_entry->root_node()->frame_entry->url());
  ASSERT_EQ(1U, restored_entry->root_node()->children.size());
  EXPECT_EQ(frame_url_b,
            restored_entry->root_node()->children[0]->frame_entry->url());

  // 5. Restore the new entry in a new tab and verify the correct URLs load.
  std::vector<std::unique_ptr<NavigationEntry>> entries;
  entries.push_back(std::move(restored_entry));
  Shell* new_shell = Shell::CreateNewWindow(
      controller.GetBrowserContext(), GURL::EmptyGURL(), nullptr, gfx::Size());
  FrameTreeNode* new_root =
      static_cast<WebContentsImpl*>(new_shell->web_contents())
          ->GetFrameTree()
          ->root();
  NavigationControllerImpl& new_controller =
      static_cast<NavigationControllerImpl&>(
          new_shell->web_contents()->GetController());
  new_controller.Restore(entries.size() - 1,
                         RestoreType::LAST_SESSION_EXITED_CLEANLY, &entries);
  ASSERT_EQ(0u, entries.size());
  {
    TestNavigationObserver restore_observer(new_shell->web_contents());
    new_controller.LoadIfNecessary();
    restore_observer.Wait();
  }
  ASSERT_EQ(1U, new_root->child_count());
  EXPECT_EQ(main_url_a, new_root->current_url());
  EXPECT_EQ(frame_url_b, new_root->child_at(0)->current_url());

  EXPECT_EQ(1, new_controller.GetEntryCount());
  EXPECT_EQ(0, new_controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* new_entry = new_controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the b.com subframe.
  EXPECT_EQ(main_url_a, new_entry->root_node()->frame_entry->url());
  ASSERT_EQ(1U, new_entry->root_node()->children.size());
  EXPECT_EQ(frame_url_b,
            new_entry->root_node()->children[0]->frame_entry->url());
}

// Verify that we can finish loading a page on restore if the PageState is
// missing subframes.  See https://crbug.com/638088.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_RestoreViaPartialPageState) {
  GURL main_url(embedded_test_server()->GetURL(
      "a.com", "/navigation_controller/inject_into_blank_iframe.html"));
  GURL blank_url(url::kAboutBlankURL);
  NavigationControllerImpl& controller =
      static_cast<NavigationControllerImpl&>(
          shell()->web_contents()->GetController());
  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())
          ->GetFrameTree()
          ->root();

  // Create a NavigationEntry to restore, as if it had been loaded before.  The
  // page has an about:blank iframe and injects content into it, but the
  // PageState lacks any subframe history items.  This may happen during a
  // restore of a bad session or if the page has changed since the last visit.
  // Chrome should be robust to this and should be able to load the frame from
  // its default URL.
  std::unique_ptr<NavigationEntryImpl> restored_entry =
      NavigationEntryImpl::FromNavigationEntry(
          NavigationController::CreateNavigationEntry(
              main_url, Referrer(), ui::PAGE_TRANSITION_RELOAD, false,
              std::string(), controller.GetBrowserContext(),
              nullptr /* blob_url_loader_factory */));
  restored_entry->SetPageState(PageState::CreateFromURL(main_url));
  EXPECT_EQ(0U, restored_entry->root_node()->children.size());

  // Restore the new entry in a new tab and verify the iframe loads and has
  // content injected into it.
  std::vector<std::unique_ptr<NavigationEntry>> entries;
  entries.push_back(std::move(restored_entry));
  controller.Restore(entries.size() - 1,
                     RestoreType::LAST_SESSION_EXITED_CLEANLY, &entries);
  ASSERT_EQ(0u, entries.size());
  {
    TestNavigationObserver restore_observer(shell()->web_contents());
    controller.LoadIfNecessary();
    restore_observer.Wait();
  }
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(main_url, root->current_url());
  EXPECT_EQ(blank_url, root->child_at(0)->current_url());

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* new_entry = controller.GetLastCommittedEntry();

  // The entry should have a FrameNavigationEntry for the blank subframe.
  EXPECT_EQ(main_url, new_entry->root_node()->frame_entry->url());
  ASSERT_EQ(1U, new_entry->root_node()->children.size());
  EXPECT_EQ(blank_url, new_entry->root_node()->children[0]->frame_entry->url());

  // Verify that the parent was able to script the iframe.
  EXPECT_EQ("Injected text",
            EvalJs(root->child_at(0), "document.body.innerHTML"));
}

// Verifies that the |frame_unique_name| is set to the correct frame, so that we
// can match subframe FrameNavigationEntries to newly created frames after
// back/forward and restore.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_FrameUniqueName) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // 1. Navigate the main frame.
  GURL url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  SiteInstance* main_site_instance =
      root->current_frame_host()->GetSiteInstance();

  // The main frame defaults to an empty name.
  FrameNavigationEntry* frame_entry =
      controller.GetLastCommittedEntry()->GetFrameEntry(root);
  EXPECT_EQ("", frame_entry->frame_unique_name());

  // 2. Add an unnamed subframe, which does an AUTO_SUBFRAME navigation.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + url.spec() + "';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // The root FrameNavigationEntry hasn't changed.
  EXPECT_EQ(frame_entry,
            controller.GetLastCommittedEntry()->GetFrameEntry(root));

  // The subframe should have a generated name.
  FrameTreeNode* subframe = root->child_at(0);
  EXPECT_EQ(main_site_instance,
            subframe->current_frame_host()->GetSiteInstance());
  FrameNavigationEntry* subframe_entry =
      controller.GetLastCommittedEntry()->GetFrameEntry(subframe);
  EXPECT_THAT(subframe_entry->frame_unique_name(),
              testing::HasSubstr("dynamicFrame"));

  // 3. Add a named subframe.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string script = "var iframe = document.createElement('iframe');"
                         "iframe.src = '" + url.spec() + "';"
                         "iframe.name = 'foo';"
                         "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // The new subframe should have the specified name.
  EXPECT_EQ(frame_entry,
            controller.GetLastCommittedEntry()->GetFrameEntry(root));
  FrameTreeNode* foo_subframe = root->child_at(1);
  EXPECT_EQ(main_site_instance,
            foo_subframe->current_frame_host()->GetSiteInstance());
  FrameNavigationEntry* foo_subframe_entry =
      controller.GetLastCommittedEntry()->GetFrameEntry(foo_subframe);
  EXPECT_THAT(foo_subframe_entry->frame_unique_name(),
              testing::HasSubstr("dynamicFrame"));

  // 4. Navigating in the subframes cross-process shouldn't change their names.
  // TODO(creis): Fix the unnamed case in https://crbug.com/502317.
  GURL bar_url(embedded_test_server()->GetURL(
      "bar.com", "/navigation_controller/simple_page_1.html"));
  NavigateFrameToURL(foo_subframe, bar_url);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  // When run just with subframe navigation entries enabled and not in
  // site-per-process-mode the subframe should be in the same SiteInstance as
  // its parent.
  if (!AreAllSitesIsolatedForTesting()) {
    EXPECT_EQ(main_site_instance,
              foo_subframe->current_frame_host()->GetSiteInstance());
  } else {
    EXPECT_NE(main_site_instance,
              foo_subframe->current_frame_host()->GetSiteInstance());
  }

  foo_subframe_entry =
      controller.GetLastCommittedEntry()->GetFrameEntry(foo_subframe);
  EXPECT_THAT(foo_subframe_entry->frame_unique_name(),
              testing::HasSubstr("dynamicFrame"));
}

// Verify that navigations caused by client-side redirects populates the entry's
// replaced data.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ReplacedNavigationEntryData_ClientSideRedirect) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/client_redirect.html"));
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));

  {
    TestNavigationManager navigation_manager_1(shell()->web_contents(), url1);
    TestNavigationManager navigation_manager_2(shell()->web_contents(), url2);

    shell()->LoadURL(url1);

    navigation_manager_1.WaitForNavigationFinished();  // Initial navigation.
    navigation_manager_2.WaitForNavigationFinished();  // Client-side redirect.

    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url2, entry1->GetURL());
    ASSERT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_CLIENT_REDIRECT)));

    ASSERT_TRUE(entry1->GetReplacedEntryData().has_value());
    EXPECT_EQ(url1, entry1->GetReplacedEntryData()->first_committed_url);
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetReplacedEntryData()->first_transition_type,
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)))
        << base::StringPrintf(
               "%X", entry1->GetReplacedEntryData()->first_transition_type);
  }
}

// Verify that navigations caused by location.replace() populates the entry's
// replaced data.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ReplacedNavigationEntryData_LocationReplace) {
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));

  // Test fixture: start with typing a URL.
  {
    ASSERT_TRUE(NavigateToURL(shell(), url1));
    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url1, entry1->GetURL());
    ASSERT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_FALSE(entry1->GetReplacedEntryData().has_value());
  }

  const base::Time time1 = controller.GetEntryAtIndex(0)->GetTimestamp();

  {
    // location.replace().
    FrameNavigateParamsCapturer capturer(root);
    std::string script = "location.replace('" + url2.spec() + "')";
    EXPECT_TRUE(ExecuteScript(root, script));
    capturer.Wait();

    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url2, entry1->GetURL());
    ASSERT_NE(time1, entry1->GetTimestamp());

    ASSERT_TRUE(entry1->GetReplacedEntryData().has_value());
    EXPECT_EQ(url1, entry1->GetReplacedEntryData()->first_committed_url);
    EXPECT_EQ(time1, entry1->GetReplacedEntryData()->first_timestamp);
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetReplacedEntryData()->first_transition_type,
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
  }
}

// Verify that history.replaceState() populates the navigation entry's replaced
// entry data.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ReplacedNavigationEntryData_ReplaceState) {
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  GURL url3(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_3.html"));

  // Test fixture: start with typing a URL.
  {
    ASSERT_TRUE(NavigateToURL(shell(), url1));
    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url1, entry1->GetURL());
    ASSERT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_FALSE(entry1->GetReplacedEntryData().has_value());
  }

  const base::Time time1 = controller.GetEntryAtIndex(0)->GetTimestamp();

  {
    // history.replaceState().
    FrameNavigateParamsCapturer capturer(root);
    std::string script =
        "history.replaceState({}, 'page 2', 'simple_page_2.html')";
    ASSERT_TRUE(ExecuteScript(root, script));
    capturer.Wait();

    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url2, entry1->GetURL());
    ASSERT_NE(time1, entry1->GetTimestamp());

    ASSERT_TRUE(entry1->GetReplacedEntryData().has_value());
    EXPECT_EQ(url1, entry1->GetReplacedEntryData()->first_committed_url);
    EXPECT_EQ(time1, entry1->GetReplacedEntryData()->first_timestamp);
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetReplacedEntryData()->first_transition_type,
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
  }

  {
    // Reload from the renderer side and make sure the replaced entry data
    // doesn't change.
    FrameNavigateParamsCapturer capturer(root);
    ASSERT_TRUE(ExecuteScript(root, "location.reload()"));
    capturer.Wait();

    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url2, entry1->GetURL());
    ASSERT_NE(time1, entry1->GetTimestamp());

    ASSERT_TRUE(entry1->GetReplacedEntryData().has_value());
    EXPECT_EQ(url1, entry1->GetReplacedEntryData()->first_committed_url);
    EXPECT_EQ(time1, entry1->GetReplacedEntryData()->first_timestamp);
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetReplacedEntryData()->first_transition_type,
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
  }

  {
    // history.replaceState().
    FrameNavigateParamsCapturer capturer(root);
    std::string script =
        "history.replaceState({}, 'page 3', 'simple_page_3.html')";
    ASSERT_TRUE(ExecuteScript(root, script));
    capturer.Wait();

    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url3, entry1->GetURL());
    ASSERT_NE(time1, entry1->GetTimestamp());

    ASSERT_TRUE(entry1->GetReplacedEntryData().has_value());
    EXPECT_EQ(url1, entry1->GetReplacedEntryData()->first_committed_url);
    EXPECT_EQ(time1, entry1->GetReplacedEntryData()->first_timestamp);
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetReplacedEntryData()->first_transition_type,
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
  }
}

// Verify that history.pushState() does not populate the navigation entry's
// replaced entry data.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ReplacedNavigationEntryData_PushState) {
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));

  // Test fixture: start with typing a URL.
  {
    ASSERT_TRUE(NavigateToURL(shell(), url1));
    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url1, entry1->GetURL());
    ASSERT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_FALSE(entry1->GetReplacedEntryData().has_value());
  }

  {
    // history.pushState().
    FrameNavigateParamsCapturer capturer(root);
    std::string script =
        "history.pushState({}, 'page 2', 'simple_page_2.html')";
    ASSERT_TRUE(ExecuteScript(root, script));
    capturer.Wait();

    ASSERT_EQ(2, controller.GetEntryCount());
    ASSERT_EQ(url1, controller.GetEntryAtIndex(0)->GetURL());
    ASSERT_EQ(url2, controller.GetEntryAtIndex(1)->GetURL());

    EXPECT_FALSE(
        controller.GetEntryAtIndex(0)->GetReplacedEntryData().has_value());
    EXPECT_FALSE(
        controller.GetEntryAtIndex(1)->GetReplacedEntryData().has_value());
  }
}

// Verify that location.reload() does not populate the navigation entry's
// replaced entry data.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ReplacedNavigationEntryData_LocationReload) {
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));

  // Test fixture: start with typing a URL.
  {
    ASSERT_TRUE(NavigateToURL(shell(), url1));
    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url1, entry1->GetURL());
    ASSERT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_FALSE(entry1->GetReplacedEntryData().has_value());
  }

  const base::Time time1 = controller.GetEntryAtIndex(0)->GetTimestamp();

  {
    // Reload from the renderer side and make sure replaced entry data is not
    // stored.
    FrameNavigateParamsCapturer capturer(root);
    ASSERT_TRUE(ExecuteScript(root, "location.reload()"));
    capturer.Wait();

    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url1, entry1->GetURL());
    ASSERT_NE(time1, entry1->GetTimestamp());

    // At least the timestamp has changed, so we need to keep a copy of the
    // replaced data.
    ASSERT_TRUE(entry1->GetReplacedEntryData().has_value());
    EXPECT_EQ(url1, entry1->GetReplacedEntryData()->first_committed_url);
    EXPECT_EQ(time1, entry1->GetReplacedEntryData()->first_timestamp);
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetReplacedEntryData()->first_transition_type,
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
  }
}

// Verify the scenario where the user goes back to a navigatin entry that had
// previously replaced it's URL (via history.replaceState()), for a URL that
// (if fetched) causes a server-side redirect. In this scenario, the fact of
// going back should not influence the replaced data, and hence the first URL
// prior to history.replaceState() should remain set.
IN_PROC_BROWSER_TEST_F(
    NavigationControllerBrowserTest,
    ReplacedNavigationEntryData_BackAfterReplaceStateWithRedirect) {
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  GURL redirecting_url_to_url2(
      embedded_test_server()->GetURL("/server-redirect?" + url2.spec()));
  GURL url3(embedded_test_server()->GetURL("/simple_page.html"));

  // Start with typing a URL.
  {
    ASSERT_TRUE(NavigateToURL(shell(), url1));
    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url1, entry1->GetURL());
    ASSERT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_FALSE(entry1->GetReplacedEntryData().has_value());
  }

  {
    // history.replaceState(), pointing to a URL that would redirect to |url2|.
    FrameNavigateParamsCapturer capturer(root);
    std::string script = "history.replaceState({}, 'page 2', '" +
                         redirecting_url_to_url2.spec() + "')";

    ASSERT_TRUE(ExecuteScript(root, script));
    capturer.Wait();

    ASSERT_EQ(1, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(redirecting_url_to_url2, entry1->GetURL());
    ASSERT_TRUE(entry1->GetReplacedEntryData().has_value());
    ASSERT_EQ(url1, entry1->GetReplacedEntryData()->first_committed_url);
  }

  // Type another URL, |url3|.
  {
    ASSERT_TRUE(NavigateToURL(shell(), url3));
    ASSERT_EQ(2, controller.GetEntryCount());
  }

  // Back, which should redirect to |url2|.
  {
    FrameNavigateParamsCapturer capturer(root);
    shell()->web_contents()->GetController().GoBack();
    capturer.Wait();

    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    ASSERT_EQ(url2, entry1->GetURL());

    // We still expect |url1| in the replaced data.
    ASSERT_TRUE(entry1->GetReplacedEntryData().has_value());
    EXPECT_EQ(url1, entry1->GetReplacedEntryData()->first_committed_url);
  }
}

// Verify that navigating back in history does not populate the navigation
// entry's replaced entry data.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ReplacedNavigationEntryData_Back) {
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));

  // Test fixture: start with typing two URLs.
  {
    ASSERT_TRUE(NavigateToURL(shell(), url1));
    ASSERT_TRUE(NavigateToURL(shell(), url2));
    ASSERT_EQ(2, controller.GetEntryCount());
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    NavigationEntry* entry2 = controller.GetEntryAtIndex(1);
    ASSERT_EQ(url1, entry1->GetURL());
    ASSERT_EQ(url2, entry2->GetURL());
    ASSERT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    ASSERT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry2->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_FALSE(entry1->GetReplacedEntryData().has_value());
    EXPECT_FALSE(entry2->GetReplacedEntryData().has_value());
  }

  const base::Time time1 = controller.GetEntryAtIndex(0)->GetTimestamp();

  {
    // Back.
    FrameNavigateParamsCapturer capturer(root);
    shell()->web_contents()->GetController().GoBack();
    capturer.Wait();

    // Assertions below document the current behavior.
    NavigationEntry* entry1 = controller.GetEntryAtIndex(0);
    NavigationEntry* entry2 = controller.GetEntryAtIndex(1);
    ASSERT_EQ(url1, entry1->GetURL());
    ASSERT_NE(time1, entry1->GetTimestamp());
    ASSERT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry1->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR |
                                  ui::PAGE_TRANSITION_FORWARD_BACK)));
    ASSERT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        entry2->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));

    // It is questionable whether a copy of the replaced data should be made
    // here too, because of the modified timestamp as well as the new qualifier,
    // ui::PAGE_TRANSITION_FORWARD_BACK. However, we've decided against since
    // there is no actual replacement happening.
    EXPECT_FALSE(entry1->GetReplacedEntryData().has_value());
    EXPECT_FALSE(entry2->GetReplacedEntryData().has_value());
  }
}

// Ensure we don't crash when cloning a named window.  This happened in
// https://crbug.com/603245 because neither the FrameTreeNode ID nor the name of
// the cloned window matched the root FrameNavigationEntry.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, CloneNamedWindow) {
  // Start on an initial page.
  GURL url_1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url_1));

  // Name the window.
  EXPECT_TRUE(ExecJs(shell(), "window.name = 'foo';"));

  // Navigate it.
  GURL url_2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url_2));

  // Clone the tab and load the page.
  std::unique_ptr<WebContents> new_tab = shell()->web_contents()->Clone();
  WebContentsImpl* new_tab_impl = static_cast<WebContentsImpl*>(new_tab.get());
  NavigationController& new_controller = new_tab_impl->GetController();
  EXPECT_TRUE(new_controller.IsInitialNavigation());
  EXPECT_TRUE(new_controller.NeedsReload());
  {
    TestNavigationObserver clone_observer(new_tab.get());
    new_controller.LoadIfNecessary();
    clone_observer.Wait();
  }
}

// Ensure we don't crash when going back in a cloned named window.  This
// happened in https://crbug.com/603245 because neither the FrameTreeNode ID nor
// the name of the cloned window matched the root FrameNavigationEntry.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       CloneAndGoBackWithNamedWindow) {
  // Start on an initial page.
  GURL url_1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url_1));

  // Name the window.
  EXPECT_TRUE(ExecJs(shell(), "window.name = 'foo';"));

  // Navigate it.
  GURL url_2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url_2));

  // Clear the name.
  EXPECT_TRUE(ExecJs(shell(), "window.name = '';"));

  // Navigate it again.
  EXPECT_TRUE(NavigateToURL(shell(), url_1));

  // Clone the tab and load the page.
  std::unique_ptr<WebContents> new_tab = shell()->web_contents()->Clone();
  WebContentsImpl* new_tab_impl = static_cast<WebContentsImpl*>(new_tab.get());
  NavigationController& new_controller = new_tab_impl->GetController();
  EXPECT_TRUE(new_controller.IsInitialNavigation());
  EXPECT_TRUE(new_controller.NeedsReload());
  {
    TestNavigationObserver clone_observer(new_tab.get());
    new_controller.LoadIfNecessary();
    clone_observer.Wait();
  }

  // Go back.
  {
    TestNavigationObserver back_load_observer(new_tab.get());
    new_controller.GoBack();
    back_load_observer.Wait();
  }
}

// Ensure that going back/forward to an apparently same document
// NavigationEntry works when the renderer process hasn't committed anything
// yet.  This can happen when using Ctrl+Back or after a crash.  See
// https://crbug.com/635403.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       BackSameDocumentInNewWindow) {
  // Start on an initial page.
  GURL url_1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url_1));

  // Perform same document navigation.
  GURL url_2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html#foo"));
  EXPECT_TRUE(NavigateToURL(shell(), url_2));

  // Clone the tab but don't load last committed page.
  std::unique_ptr<WebContents> new_tab = shell()->web_contents()->Clone();
  WebContentsImpl* new_tab_impl = static_cast<WebContentsImpl*>(new_tab.get());
  NavigationController& new_controller = new_tab_impl->GetController();
  EXPECT_TRUE(new_controller.IsInitialNavigation());
  EXPECT_TRUE(new_controller.NeedsReload());

  // Go back in the new tab.
  {
    TestNavigationObserver back_load_observer(new_tab.get());
    new_controller.GoBack();
    back_load_observer.Wait();
  }

  // Make sure the new tab isn't still loading.
  EXPECT_EQ(url_1, new_controller.GetLastCommittedEntry()->GetURL());
  EXPECT_FALSE(new_tab_impl->IsLoading());

  // Also check going back in the original tab after a renderer crash.
  NavigationController& controller = shell()->web_contents()->GetController();
  RenderProcessHost* process =
      shell()->web_contents()->GetMainFrame()->GetProcess();
  RenderProcessHostWatcher crash_observer(
      process, RenderProcessHostWatcher::WATCH_FOR_PROCESS_EXIT);
  process->Shutdown(0);
  crash_observer.Wait();
  {
    TestNavigationObserver back_load_observer(shell()->web_contents());
    controller.GoBack();
    back_load_observer.Wait();
  }

  // Make sure the original tab isn't still loading.
  EXPECT_EQ(url_1, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_FALSE(shell()->web_contents()->IsLoading());
}

// Ensures that FrameNavigationEntries for dynamically added iframes can be
// found correctly when cloning them during a transfer.  If we don't look for
// them based on unique name in AddOrUpdateFrameEntry, the FrameTreeNode ID
// mismatch will cause us to create a second FrameNavigationEntry during the
// transfer.  Later, we'll find the wrong FrameNavigationEntry (the earlier one
// from the clone which still has a PageState), and this will cause the renderer
// to crash in NavigateInternal because the PageState is present but the page_id
// is -1 (similar to https://crbug.com/568703).  See https://crbug.com/568768.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_RepeatCreatedFrame) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // 1. Navigate the main frame.
  GURL url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  SiteInstance* main_site_instance =
      root->current_frame_host()->GetSiteInstance();

  // 2. Add a cross-site subframe.
  GURL frame_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  std::string script = "var iframe = document.createElement('iframe');"
                       "iframe.src = '" + frame_url.spec() + "';"
                       "document.body.appendChild(iframe);";
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  FrameTreeNode* subframe = root->child_at(0);
  if (AreAllSitesIsolatedForTesting()) {
    EXPECT_NE(main_site_instance,
              subframe->current_frame_host()->GetSiteInstance());
  }
  FrameNavigationEntry* subframe_entry =
      controller.GetLastCommittedEntry()->GetFrameEntry(subframe);
  EXPECT_EQ(frame_url, subframe_entry->url());

  // 3. Reload the main frame.
  {
    FrameNavigateParamsCapturer capturer(root);
    controller.Reload(ReloadType::NORMAL, false);
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_RELOAD));
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_FALSE(capturer.is_same_document());
  }

  // 4. Add the iframe again.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }
  if (AreAllSitesIsolatedForTesting()) {
    EXPECT_NE(main_site_instance,
              root->child_at(0)->current_frame_host()->GetSiteInstance());
  }
}

// Verifies that item sequence numbers and document sequence numbers update
// properly for main frames and subframes.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_SequenceNumbers) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // 1. Navigate the main frame.
  GURL url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  FrameNavigationEntry* frame_entry =
      controller.GetLastCommittedEntry()->GetFrameEntry(root);
  int64_t isn_1 = frame_entry->item_sequence_number();
  int64_t dsn_1 = frame_entry->document_sequence_number();
  EXPECT_NE(-1, isn_1);
  EXPECT_NE(-1, dsn_1);

  // 2. Do a same document fragment navigation.
  std::string script = "document.getElementById('fraglink').click()";
  EXPECT_TRUE(ExecJs(root, script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  frame_entry = controller.GetLastCommittedEntry()->GetFrameEntry(root);
  int64_t isn_2 = frame_entry->item_sequence_number();
  int64_t dsn_2 = frame_entry->document_sequence_number();
  EXPECT_NE(-1, isn_2);
  EXPECT_NE(isn_1, isn_2);
  EXPECT_EQ(dsn_1, dsn_2);

  // 3. Add a subframe, which does an AUTO_SUBFRAME navigation.
  {
    LoadCommittedCapturer capturer(shell()->web_contents());
    std::string add_script = "var iframe = document.createElement('iframe');"
                             "iframe.src = '" + url.spec() + "';"
                             "document.body.appendChild(iframe);";
    EXPECT_TRUE(ExecJs(root, add_script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  // The root FrameNavigationEntry hasn't changed.
  EXPECT_EQ(frame_entry,
            controller.GetLastCommittedEntry()->GetFrameEntry(root));

  // We should have a unique ISN and DSN for the subframe entry.
  FrameTreeNode* subframe = root->child_at(0);
  FrameNavigationEntry* subframe_entry =
      controller.GetLastCommittedEntry()->GetFrameEntry(subframe);
  int64_t isn_3 = subframe_entry->item_sequence_number();
  int64_t dsn_3 = subframe_entry->document_sequence_number();
  EXPECT_NE(-1, isn_2);
  EXPECT_NE(isn_2, isn_3);
  EXPECT_NE(dsn_2, dsn_3);

  // 4. Do a same document fragment navigation in the subframe.
  EXPECT_TRUE(ExecJs(subframe, script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  subframe_entry = controller.GetLastCommittedEntry()->GetFrameEntry(subframe);
  int64_t isn_4 = subframe_entry->item_sequence_number();
  int64_t dsn_4 = subframe_entry->document_sequence_number();
  EXPECT_NE(-1, isn_4);
  EXPECT_NE(isn_3, isn_4);
  EXPECT_EQ(dsn_3, dsn_4);
}

// Verifies that the FrameNavigationEntry's redirect chain is created for the
// main frame.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_MainFrameRedirectChain) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // Navigate the main frame to a redirecting URL (server-side)
  GURL final_url(embedded_test_server()->GetURL("/simple_page.html"));
  GURL redirecting_url(
      embedded_test_server()->GetURL("/server-redirect?/simple_page.html"));
  NavigateToURLBlockUntilNavigationsComplete(shell(), redirecting_url, 1);
  EXPECT_TRUE(IsLastCommittedEntryOfPageType(shell()->web_contents(),
                                             PAGE_TYPE_NORMAL));
  EXPECT_TRUE(shell()->web_contents()->GetLastCommittedURL() == final_url);

  // Check last committed NavigationEntry's redirects.
  EXPECT_EQ(1, controller.GetEntryCount());
  content::NavigationEntry* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(entry->GetRedirectChain().size(), 2u);
  EXPECT_EQ(entry->GetRedirectChain()[0], redirecting_url);
  EXPECT_EQ(entry->GetRedirectChain()[1], final_url);
}

// Verifies that FrameNavigationEntry's redirect chain is created and stored on
// the right subframe (AUTO_SUBFRAME navigation).
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_AutoSubFrameRedirectChain) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe_redirect.html"));
  GURL iframe_redirect_url(
      embedded_test_server()->GetURL("/server-redirect?/simple_page.html"));
  GURL iframe_final_url(embedded_test_server()->GetURL("/simple_page.html"));

  // Navigate to a page with an redirecting iframe.
  EXPECT_TRUE(NavigateToURL(shell(), main_url));

  // Check that the main frame redirect chain contains only one url.
  EXPECT_EQ(1, controller.GetEntryCount());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(entry->GetRedirectChain().size(), 1u);
  EXPECT_EQ(entry->GetRedirectChain()[0], main_url);

  // Check that the FrameNavigationEntry's redirect chain contains 2 urls.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  FrameNavigationEntry* frame_entry =
      entry->root_node()->children[0]->frame_entry.get();
  EXPECT_EQ(frame_entry->redirect_chain().size(), 2u);
  EXPECT_EQ(frame_entry->redirect_chain()[0], iframe_redirect_url);
  EXPECT_EQ(frame_entry->redirect_chain()[1], iframe_final_url);
}

// Verifies that FrameNavigationEntry's redirect chain is created and stored on
// the right subframe (NEW_SUBFRAME navigation).
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       FrameNavigationEntry_NewSubFrameRedirectChain) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // 1. Navigate to a page with an iframe.
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_data_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  EXPECT_EQ(1, controller.GetEntryCount());

  // 2. Navigate in the subframe with a redirection.
  GURL frame_final_url(embedded_test_server()->GetURL("/simple_page.html"));
  GURL frame_redirect_url(
      embedded_test_server()->GetURL("/server-redirect?/simple_page.html"));
  NavigateFrameToURL(root->child_at(0), frame_redirect_url);

  // Check that the main frame redirect chain contains only the main_url.
  EXPECT_EQ(2, controller.GetEntryCount());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(entry->GetRedirectChain().size(), 1u);
  EXPECT_EQ(entry->GetRedirectChain()[0], main_url);

  // Check that the FrameNavigationEntry's redirect chain contains 2 urls.
  ASSERT_EQ(1U, entry->root_node()->children.size());
  FrameNavigationEntry* frame_entry =
      entry->root_node()->children[0]->frame_entry.get();
  EXPECT_EQ(frame_entry->redirect_chain().size(), 2u);
  EXPECT_EQ(frame_entry->redirect_chain()[0], frame_redirect_url);
  EXPECT_EQ(frame_entry->redirect_chain()[1], frame_final_url);
}

// Verify that restoring a NavigationEntry with cross-site subframes does not
// create out-of-process iframes unless the current SiteIsolationPolicy says to.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       RestoreWithoutExtraOopifs) {
  // 1. Start on a page with a data URL iframe.
  GURL main_url_a(embedded_test_server()->GetURL(
      "a.com", "/navigation_controller/page_with_data_iframe.html"));
  GURL data_url("data:text/html,Subframe");
  EXPECT_TRUE(NavigateToURL(shell(), main_url_a));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());

  // 2. Navigate the iframe cross-site.
  GURL frame_url_b(embedded_test_server()->GetURL(
      "b.com", "/navigation_controller/simple_page_1.html"));
  NavigateFrameToURL(root->child_at(0), frame_url_b);
  EXPECT_EQ(main_url_a, root->current_url());
  EXPECT_EQ(frame_url_b, root->child_at(0)->current_url());

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  NavigationEntryImpl* entry2 = controller.GetLastCommittedEntry();

  // 3. Create a NavigationEntry with the same PageState as |entry2|.
  std::unique_ptr<NavigationEntryImpl> restored_entry =
      NavigationEntryImpl::FromNavigationEntry(
          NavigationController::CreateNavigationEntry(
              main_url_a, Referrer(), ui::PAGE_TRANSITION_RELOAD, false,
              std::string(), controller.GetBrowserContext(),
              nullptr /* blob_url_loader_factory */));
  EXPECT_EQ(0U, restored_entry->root_node()->children.size());
  restored_entry->SetPageState(entry2->GetPageState());

  // The entry should have no SiteInstance in the FrameNavigationEntry for the
  // b.com subframe.
  EXPECT_FALSE(
      restored_entry->root_node()->children[0]->frame_entry->site_instance());

  // 4. Restore the new entry in a new tab and verify the correct URLs load.
  std::vector<std::unique_ptr<NavigationEntry>> entries;
  entries.push_back(std::move(restored_entry));
  Shell* new_shell = Shell::CreateNewWindow(
      controller.GetBrowserContext(), GURL::EmptyGURL(), nullptr, gfx::Size());
  FrameTreeNode* new_root =
      static_cast<WebContentsImpl*>(new_shell->web_contents())
          ->GetFrameTree()
          ->root();
  NavigationControllerImpl& new_controller =
      static_cast<NavigationControllerImpl&>(
          new_shell->web_contents()->GetController());
  new_controller.Restore(entries.size() - 1,
                         RestoreType::LAST_SESSION_EXITED_CLEANLY, &entries);
  ASSERT_EQ(0u, entries.size());
  {
    TestNavigationObserver restore_observer(new_shell->web_contents());
    new_controller.LoadIfNecessary();
    restore_observer.Wait();
  }
  ASSERT_EQ(1U, new_root->child_count());
  EXPECT_EQ(main_url_a, new_root->current_url());
  EXPECT_EQ(frame_url_b, new_root->child_at(0)->current_url());

  // The subframe should only be in a different SiteInstance if OOPIFs are
  // required for all sites.
  if (AreAllSitesIsolatedForTesting()) {
    EXPECT_NE(new_root->current_frame_host()->GetSiteInstance(),
              new_root->child_at(0)->current_frame_host()->GetSiteInstance());
  } else {
    EXPECT_EQ(new_root->current_frame_host()->GetSiteInstance(),
              new_root->child_at(0)->current_frame_host()->GetSiteInstance());
  }
}

namespace {

// Loads |start_url|, then loads |stalled_url| which stalls. While the page is
// stalled, a same document navigation happens. Make sure that all the
// navigations are properly classified.
void DoReplaceStateWhilePending(Shell* shell,
                                const GURL& start_url,
                                const GURL& stalled_url,
                                const std::string& replace_state_filename) {
  NavigationControllerImpl& controller =
      static_cast<NavigationControllerImpl&>(
          shell->web_contents()->GetController());

  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell->web_contents())->
          GetFrameTree()->root();

  // Start with one page.
  EXPECT_TRUE(NavigateToURL(shell, start_url));

  // Have the user decide to go to a different page which is very slow.
  TestNavigationManager stalled_navigation(shell->web_contents(), stalled_url);
  controller.LoadURL(stalled_url, Referrer(), ui::PAGE_TRANSITION_LINK,
                     std::string());
  EXPECT_TRUE(stalled_navigation.WaitForRequestStart());

  // That should be the pending entry.
  NavigationEntryImpl* entry = controller.GetPendingEntry();
  ASSERT_NE(nullptr, entry);
  EXPECT_EQ(stalled_url, entry->GetURL());

  {
    // Now the existing page uses history.replaceState().
    FrameNavigateParamsCapturer capturer(root);
    capturer.set_wait_for_load(false);
    std::string script =
        "history.replaceState({}, '', '" + replace_state_filename + "')";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();

    // The fact that there was a pending entry shouldn't interfere with the
    // classification.
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }
}

}  // namespace

IN_PROC_BROWSER_TEST_F(
    NavigationControllerBrowserTest,
    NavigationTypeClassification_On1SameDocumentToXWhile2Pending) {
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  DoReplaceStateWhilePending(shell(), url1, url2, "x");
}

IN_PROC_BROWSER_TEST_F(
    NavigationControllerBrowserTest,
    NavigationTypeClassification_On1SameDocumentTo2While2Pending) {
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  DoReplaceStateWhilePending(shell(), url1, url2, "simple_page_2.html");
}

IN_PROC_BROWSER_TEST_F(
    NavigationControllerBrowserTest,
    NavigationTypeClassification_On1SameDocumentToXWhile1Pending) {
  GURL url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  DoReplaceStateWhilePending(shell(), url, url, "x");
}

IN_PROC_BROWSER_TEST_F(
    NavigationControllerBrowserTest,
    NavigationTypeClassification_On1SameDocumentTo1While1Pending) {
  GURL url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  DoReplaceStateWhilePending(shell(), url, url, "simple_page_1.html");
}

// Ensure that a pending NavigationEntry for a different navigation doesn't
// cause a commit to be incorrectly treated as a replacement.
// See https://crbug.com/593153.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       OtherCommitDuringPendingEntryWithReplacement) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // Load an initial page.
  GURL start_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), start_url));
  int entry_count = controller.GetEntryCount();
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(start_url, controller.GetLastCommittedEntry()->GetURL());

  // Start a cross-process navigation with replacement, which never completes.
  GURL foo_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/page_with_links.html"));
  TestNavigationManager stalled_navigation(shell()->web_contents(), foo_url);
  NavigationController::LoadURLParams params(foo_url);
  params.should_replace_current_entry = true;
  controller.LoadURLWithParams(params);
  EXPECT_TRUE(stalled_navigation.WaitForRequestStart());

  // That should be the pending entry.
  NavigationEntryImpl* entry = controller.GetPendingEntry();
  ASSERT_NE(nullptr, entry);
  EXPECT_EQ(foo_url, entry->GetURL());
  EXPECT_EQ(entry_count, controller.GetEntryCount());

  {
    // Now the existing page uses history.pushState() while the pending entry
    // for the other navigation still exists.
    FrameNavigateParamsCapturer capturer(root);
    capturer.set_wait_for_load(false);
    std::string script = "history.pushState({}, '', 'pushed')";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.is_same_document());
  }

  // The same document navigation should not have replaced the previous entry.
  GURL push_state_url(
      embedded_test_server()->GetURL("/navigation_controller/pushed"));
  EXPECT_EQ(entry_count + 1, controller.GetEntryCount());
  EXPECT_EQ(push_state_url, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(start_url, controller.GetEntryAtIndex(0)->GetURL());
}

// This test ensures that if we go back from a page that has a replaceState()
// call in the window.beforeunload function, we commit to the proper navigation
// entry. https://crbug.com/597239
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       BackFromPageWithReplaceStateInBeforeUnload) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // Load an initial page.
  GURL start_url(embedded_test_server()->GetURL(
      "/navigation_controller/beforeunload_replacestate_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), start_url));
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(start_url, controller.GetLastCommittedEntry()->GetURL());

  // Go to the second page.
  std::string script = "document.getElementById('thelink').click()";
  EXPECT_TRUE(ExecJs(root, script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Go back to the first page, which never completes. The attempt to unload the
  // second page, though, causes it to do a replaceState().
  TestNavigationManager manager(shell()->web_contents(), start_url);
  controller.GoBack();
  EXPECT_TRUE(manager.WaitForRequestStart());

  // The navigation that just happened was the replaceState(), which should not
  // have changed the position into the navigation entry list. Make sure that
  // the pending navigation didn't confuse anything.
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
}

// Ensure the renderer process does not get confused about the current entry
// due to subframes and replaced entries.  See https://crbug.com/480201.
// TODO(creis): Re-enable for Site Isolation FYI bots: https://crbug.com/502317.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       PreventSpoofFromSubframeAndReplace) {
  // Start at an initial URL.
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url1));

  // Now go to a page with a real iframe.
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_data_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url2));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1U, root->child_count());
  ASSERT_NE(nullptr, root->child_at(0));

  {
    // Navigate in the iframe.
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_2.html"));
    NavigateFrameToURL(root->child_at(0), frame_url);
    capturer.Wait();
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  {
    // Go back in the iframe.
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }

  {
    // Go forward in the iframe.
    TestNavigationObserver forward_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoForward();
    forward_load_observer.Wait();
  }

  GURL url3(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe.html"));
  {
    // location.replace() to cause an inert commit.
    TestNavigationObserver replace_load_observer(shell()->web_contents());
    std::string script = "location.replace('" + url3.spec() + "')";
    EXPECT_TRUE(ExecJs(root, script));
    replace_load_observer.Wait();
  }

  {
    // Go back to url2.
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();

    // Make sure the URL is correct for both the entry and the main frame, and
    // that the process hasn't been killed for showing a spoof.
    EXPECT_TRUE(root->current_frame_host()->IsRenderFrameLive());
    EXPECT_EQ(url2, shell()->web_contents()->GetLastCommittedURL());
    EXPECT_EQ(url2, root->current_url());
  }

  {
    // Go back to reset main frame entirely.
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
    EXPECT_EQ(url1, shell()->web_contents()->GetLastCommittedURL());
    EXPECT_EQ(url1, root->current_url());
  }

  {
    // Go forward.
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoForward();
    back_load_observer.Wait();
    EXPECT_EQ(url2, shell()->web_contents()->GetLastCommittedURL());
    EXPECT_EQ(url2, root->current_url());
  }

  {
    // Go forward to the replaced URL.
    TestNavigationObserver forward_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoForward();
    forward_load_observer.Wait();

    // Make sure the URL is correct for both the entry and the main frame, and
    // that the process hasn't been killed for showing a spoof.
    EXPECT_TRUE(root->current_frame_host()->IsRenderFrameLive());
    EXPECT_EQ(url3, shell()->web_contents()->GetLastCommittedURL());
    EXPECT_EQ(url3, root->current_url());
  }
}

// Ensure the renderer process does not get killed if the main frame URL's path
// changes when going back in a subframe, since this is currently possible after
// a replaceState in the main frame (thanks to https://crbug.com/373041).
// See https:///crbug.com/486916.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       SubframeBackFromReplaceState) {
  // Start at a page with a real iframe.
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_data_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url1));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1U, root->child_count());
  ASSERT_NE(nullptr, root->child_at(0));

  {
    // Navigate in the iframe.
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_2.html"));
    NavigateFrameToURL(root->child_at(0), frame_url);
    capturer.Wait();
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  {
    // history.replaceState().
    FrameNavigateParamsCapturer capturer(root);
    std::string script =
        "history.replaceState({}, 'replaced', 'replaced')";
    EXPECT_TRUE(ExecJs(root, script));
    capturer.Wait();
  }

  {
    // Go back in the iframe.
    TestNavigationObserver back_load_observer(shell()->web_contents());
    shell()->web_contents()->GetController().GoBack();
    back_load_observer.Wait();
  }

  // For now, we expect the main frame's URL to revert.  This won't happen once
  // https://crbug.com/373041 is fixed.
  EXPECT_EQ(url1, shell()->web_contents()->GetLastCommittedURL());

  // Make sure the renderer process has not been killed.
  EXPECT_TRUE(root->current_frame_host()->IsRenderFrameLive());
}

namespace {

class FailureWatcher : public WebContentsObserver {
 public:
  // Observes failure for the specified |node|.
  explicit FailureWatcher(FrameTreeNode* node)
      : WebContentsObserver(
            node->current_frame_host()->delegate()->GetAsWebContents()),
        frame_tree_node_id_(node->frame_tree_node_id()),
        message_loop_runner_(new MessageLoopRunner) {}

  void Wait() {
    message_loop_runner_->Run();
  }

 private:
  void DidFailLoad(RenderFrameHost* render_frame_host,
                   const GURL& validated_url,
                   int error_code,
                   const base::string16& error_description) override {
    RenderFrameHostImpl* rfh =
        static_cast<RenderFrameHostImpl*>(render_frame_host);
    if (rfh->frame_tree_node()->frame_tree_node_id() != frame_tree_node_id_)
      return;

    message_loop_runner_->Quit();
  }

  void DidFinishNavigation(NavigationHandle* handle) override {
    if (handle->HasCommitted() ||
        handle->GetFrameTreeNodeId() != frame_tree_node_id_) {
      return;
    }

    message_loop_runner_->Quit();
  }

  // The id of the FrameTreeNode whose navigations to observe.
  int frame_tree_node_id_;

  // The MessageLoopRunner used to spin the message loop.
  scoped_refptr<MessageLoopRunner> message_loop_runner_;
};

}  // namespace

IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       StopCausesFailureDespiteJavaScriptURL) {
  NavigationControllerImpl& controller =
      static_cast<NavigationControllerImpl&>(
          shell()->web_contents()->GetController());

  FrameTreeNode* root =
      static_cast<WebContentsImpl*>(shell()->web_contents())->
          GetFrameTree()->root();

  // Start with a normal page.
  GURL url1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url1));

  // Have the user decide to go to a different page which will not commit.
  GURL url2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  TestNavigationManager stalled_navigation(shell()->web_contents(), url2);
  controller.LoadURL(url2, Referrer(), ui::PAGE_TRANSITION_LINK, std::string());
  EXPECT_TRUE(stalled_navigation.WaitForResponse());

  // That should be the pending entry.
  NavigationEntryImpl* entry = controller.GetPendingEntry();
  ASSERT_NE(nullptr, entry);
  EXPECT_EQ(url2, entry->GetURL());

  // Loading a JavaScript URL shouldn't affect the ability to stop.
  {
    FailureWatcher watcher(root);
    GURL js("javascript:(function(){})()");
    controller.LoadURL(js, Referrer(), ui::PAGE_TRANSITION_LINK, std::string());
    EXPECT_EQ(entry, controller.GetPendingEntry());
    EXPECT_TRUE(shell()->web_contents()->IsLoading());
    shell()->web_contents()->Stop();
    watcher.Wait();
    EXPECT_FALSE(shell()->web_contents()->IsLoading());
  }
}

namespace {
class RenderProcessKilledObserver : public WebContentsObserver {
 public:
  explicit RenderProcessKilledObserver(WebContents* web_contents)
      : WebContentsObserver(web_contents) {}
  ~RenderProcessKilledObserver() override {}

  void RenderProcessGone(base::TerminationStatus status) override {
    CHECK_NE(status,
             base::TerminationStatus::TERMINATION_STATUS_PROCESS_WAS_KILLED);
  }
};
}  // namespace

// This tests a race in Reload with ReloadType::ORIGINAL_REQUEST_URL, where a
// cross-origin reload was causing an in-flight replaceState to look like a
// cross-origin navigation, even though it's same document.  (The reload should
// not modify the underlying last committed entry.)  Not crashing means that
// the test is successful.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, ReloadOriginalRequest) {
  // TODO(lukasza): https://crbug.com/417518: Get tests working with
  // --site-per-process.
  if (SiteIsolationPolicy::UseDedicatedProcessesForAllSites())
    return;

  GURL original_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), original_url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  RenderProcessKilledObserver kill_observer(shell()->web_contents());

  // Redirect so that we can use Reload with ReloadType::ORIGINAL_REQUEST_URL.
  GURL redirect_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  {
    std::string script = "location.replace('" + redirect_url.spec() + "');";
    FrameNavigateParamsCapturer capturer(root);
    EXPECT_TRUE(ExecJs(shell(), script));
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK |
                                  ui::PAGE_TRANSITION_CLIENT_REDIRECT)));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(capturer.did_replace_entry());
  }

  // Modify an entry in the session history and reload the original request.
  {
    // We first send a replaceState() to the renderer, which will cause the
    // renderer to send back a DidCommitProvisionalLoad. Immediately after,
    // we send a Reload request with ReloadType::ORIGINAL_REQUEST_URL (which in
    // this case is a different origin) and will also cause the renderer to
    // commit the frame. In the end we verify that both navigations committed
    // and that the URLs are correct.
    std::string script = "history.replaceState({}, '', 'foo');";
    root->render_manager()
        ->current_frame_host()
        ->ExecuteJavaScriptWithUserGestureForTests(base::UTF8ToUTF16(script));
    EXPECT_FALSE(shell()->web_contents()->IsLoading());
    shell()->web_contents()->GetController().Reload(
        ReloadType::ORIGINAL_REQUEST_URL, false);
    EXPECT_TRUE(shell()->web_contents()->IsLoading());
    EXPECT_EQ(redirect_url, shell()->web_contents()->GetLastCommittedURL());

    // Wait until there's no more navigations.
    GURL modified_url(embedded_test_server()->GetURL(
        "foo.com", "/navigation_controller/foo"));
    FrameNavigateParamsCapturer capturer(root);
    capturer.set_wait_for_load(false);
    capturer.set_navigations_remaining(2);
    capturer.Wait();
    EXPECT_EQ(2U, capturer.urls().size());
    EXPECT_EQ(modified_url, capturer.urls()[0]);
    EXPECT_EQ(original_url, capturer.urls()[1]);
    EXPECT_EQ(original_url, shell()->web_contents()->GetLastCommittedURL());
  }

  // Make sure the renderer is still alive.
  EXPECT_TRUE(ExecJs(shell(), "console.log('Success');"));
}

// This test shows that the initial "about:blank" URL is elided from the
// navigation history of a subframe when it is loaded.
//
// It also prevents regression for an same document navigation renderer kill
// when going back after an in-page navigation in the main frame is followed by
// an auto subframe navigation, due to a bug in HistoryEntry::CloneAndReplace.
// See https://crbug.com/612713.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       BackToAboutBlankIframe) {
  GURL original_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), original_url));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  NavigationController& controller = shell()->web_contents()->GetController();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));

  // Add an iframe with no 'src'.

  std::string script =
      "var iframe = document.createElement('iframe');"
      "iframe.id = 'frame';"
      "document.body.appendChild(iframe);";
  EXPECT_TRUE(ExecJs(root, script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());

  ASSERT_EQ(1U, root->child_count());
  FrameTreeNode* frame = root->child_at(0);
  ASSERT_NE(nullptr, frame);

  GURL blank_url(url::kAboutBlankURL);
  EXPECT_EQ(blank_url, frame->current_url());

  // Now create a new navigation entry. Note that the old navigation entry has
  // "about:blank" as the URL in the iframe.

  script = "history.pushState({}, '', 'notarealurl.html')";
  EXPECT_TRUE(ExecJs(root, script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(2, EvalJs(shell(), "history.length"));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Load the iframe; the initial "about:blank" URL should be elided and thus we
  // shouldn't get a new navigation entry.

  GURL frame_url = embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_2.html");
  NavigateFrameToURL(frame, frame_url);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(2, EvalJs(shell(), "history.length"));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  EXPECT_EQ(frame_url, frame->current_url());

  // Go back.
  {
    TestNavigationObserver observer(shell()->web_contents(), 1);
    ASSERT_TRUE(controller.CanGoBack());
    controller.GoBack();
    observer.Wait();
  }

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(2, EvalJs(shell(), "history.length"));
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());

  // There is some open discussion over whether this should send the iframe
  // back to the blank page, but for now it stays in place to preserve
  // compatibility with existing sites. See
  // NavigationControllerImpl::FindFramesToNavigate for more information, as
  // well as http://crbug.com/542299, https://crbug.com/598043 (for the
  // regressions caused by going back), and
  // https://github.com/whatwg/html/issues/546.
  // TODO(avi, creis): Figure out the correct behavior to use here.
  EXPECT_EQ(frame_url, frame->current_url());

  // Now test for https://crbug.com/612713 to prevent an NC_IN_PAGE_NAVIGATION
  // renderer kill.

  // Do a same document navigation in the subframe.
  std::string fragment_script = "location.href = \"#foo\";";
  EXPECT_TRUE(ExecJs(frame->current_frame_host(), fragment_script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(2, EvalJs(shell(), "history.length"));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  GURL frame_url_2 = embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_2.html#foo");
  EXPECT_EQ(frame_url_2, frame->current_url());

  // Go back.
  {
    TestNavigationObserver observer(shell()->web_contents(), 1);
    controller.GoBack();
    observer.Wait();
  }

  // Verify the process is still alive by running script.  We can't just call
  // IsRenderFrameLive after the navigation since it might not have disconnected
  // yet.
  EXPECT_TRUE(ExecJs(root->current_frame_host(), "true;"));
  EXPECT_TRUE(root->current_frame_host()->IsRenderFrameLive());

  // TODO(creis): We should probably go back to frame_url here instead of the
  // initial blank page.  That might require updating all relevant NavEntries to
  // know what the first committed URL is, so that we really elide the initial
  // blank page from history.
  EXPECT_EQ(blank_url, frame->current_url());
}

// This test is similar to "BackToAboutBlankIframe" above, except that a
// fragment navigation is used rather than pushState (both create a same
// document navigation, so we need to test both), and an initial 'src' is given
// to the iframe to test proper restoration in that case.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       BackToIframeWithContent) {
  GURL links_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html"));
  EXPECT_TRUE(NavigateToURL(shell(), links_url));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  NavigationController& controller = shell()->web_contents()->GetController();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));

  // Add an iframe with a 'src'.

  GURL frame_url_1 = embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html");
  std::string script =
      "var iframe = document.createElement('iframe');"
      "iframe.src = '" + frame_url_1.spec() + "';"
      "iframe.id = 'frame';"
      "document.body.appendChild(iframe);";
  EXPECT_TRUE(ExecJs(root, script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());

  ASSERT_EQ(1U, root->child_count());
  FrameTreeNode* frame = root->child_at(0);
  ASSERT_NE(nullptr, frame);

  EXPECT_EQ(frame_url_1, frame->current_url());

  // Do a fragment navigation, creating a new navigation entry. Note that the
  // old navigation entry has frame_url_1 as the URL in the iframe.

  script = "document.getElementById('fraglink').click()";
  EXPECT_TRUE(ExecJs(root, script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(2, EvalJs(shell(), "history.length"));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  EXPECT_EQ(frame_url_1, frame->current_url());

  // Navigate the iframe; unlike the test "BackToAboutBlankIframe" above, this
  // _will_ create a new navigation entry.

  GURL frame_url_2 = embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_2.html");
  NavigateFrameToURL(frame, frame_url_2);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(3, EvalJs(shell(), "history.length"));
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());

  EXPECT_EQ(frame_url_2, frame->current_url());

  // Go back two entries.
  {
    TestNavigationObserver observer(shell()->web_contents(), 1);
    ASSERT_TRUE(controller.CanGoToOffset(-2));
    controller.GoToOffset(-2);
    observer.Wait();
  }

  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(3, EvalJs(shell(), "history.length"));
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());

  // There is some open discussion over whether this should send the iframe back
  // to the original page, but for now it stays in place to preserve
  // compatibility with existing sites.  See
  // NavigationControllerImpl::FindFramesToNavigate for more information, as
  // well as http://crbug.com/542299, https://crbug.com/598043 (for the
  // regressions caused by going back), and
  // https://github.com/whatwg/html/issues/546.
  // TODO(avi, creis): Figure out the correct behavior to use here.
  EXPECT_EQ(frame_url_2, frame->current_url());

  // Now test for https://crbug.com/612713 to prevent an NC_IN_PAGE_NAVIGATION
  // renderer kill.

  // Do a same document navigation in the subframe.
  std::string fragment_script = "location.href = \"#foo\";";
  EXPECT_TRUE(ExecJs(frame->current_frame_host(), fragment_script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(2, EvalJs(shell(), "history.length"));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Go back.
  {
    TestNavigationObserver observer(shell()->web_contents(), 1);
    controller.GoBack();
    observer.Wait();
  }

  // Verify the process is still alive by running script.  We can't just call
  // IsRenderFrameLive after the navigation since it might not have disconnected
  // yet.
  EXPECT_TRUE(ExecJs(root->current_frame_host(), "true;"));
  EXPECT_TRUE(root->current_frame_host()->IsRenderFrameLive());

  // TODO(creis): It's a bit surprising to go to frame_url_1 here instead of
  // frame_url_2.  Perhaps we should be going back to frame_url_1 when going
  // back two entries above, since it's different than the initial blank case.
  EXPECT_EQ(frame_url_1, frame->current_url());
}

// Test for same document navigation kills due to using the wrong history item
// in HistoryController::RecursiveGoToEntry and
// NavigationControllerImpl::FindFramesToNavigate.
// See https://crbug.com/612713.
//
// TODO(creis): Enable this test when https://crbug.com/618100 is fixed.
// Disabled for now while we switch to the new navigation path, since this kill
// is exceptionally rare in practice.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       DISABLED_BackTwiceToIframeWithContent) {
  GURL links_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html"));
  EXPECT_TRUE(NavigateToURL(shell(), links_url));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  NavigationController& controller = shell()->web_contents()->GetController();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));

  // Add an iframe with a 'src'.

  GURL frame_url_1 = embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html");
  std::string script =
      "var iframe = document.createElement('iframe');"
      "iframe.src = '" + frame_url_1.spec() + "';"
      "iframe.id = 'frame';"
      "document.body.appendChild(iframe);";
  EXPECT_TRUE(ExecJs(root->current_frame_host(), script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());

  ASSERT_EQ(1U, root->child_count());
  FrameTreeNode* frame = root->child_at(0);
  ASSERT_NE(nullptr, frame);

  EXPECT_EQ(frame_url_1, frame->current_url());

  // Do a same document navigation in the subframe.
  GURL frame_url_2 = embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html#foo");
  std::string fragment_script = "location.href = \"#foo\";";
  EXPECT_TRUE(ExecJs(frame->current_frame_host(), fragment_script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(2, EvalJs(shell(), "history.length"));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(frame_url_2, frame->current_url());

  // Do a fragment navigation at the top level.
  std::string link_script = "document.getElementById('fraglink').click()";
  EXPECT_TRUE(ExecJs(root->current_frame_host(), link_script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(3, EvalJs(shell(), "history.length"));
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(frame_url_2, frame->current_url());

  // Go cross-site in the iframe.
  GURL frame_url_3 = embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_2.html");
  NavigateFrameToURL(frame, frame_url_3);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(4, EvalJs(shell(), "history.length"));
  EXPECT_EQ(3, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(frame_url_3, frame->current_url());

  // Go back two entries.
  {
    TestNavigationObserver observer(shell()->web_contents(), 1);
    ASSERT_TRUE(controller.CanGoToOffset(-2));
    controller.GoToOffset(-2);
    observer.Wait();
  }
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(4, EvalJs(shell(), "history.length"));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(links_url, root->current_url());

  // There is some open discussion over whether this should send the iframe back
  // to the original page, but for now it stays in place to preserve
  // compatibility with existing sites.  See
  // NavigationControllerImpl::FindFramesToNavigate for more information, as
  // well as http://crbug.com/542299, https://crbug.com/598043 (for the
  // regressions caused by going back), and
  // https://github.com/whatwg/html/issues/546.
  // TODO(avi, creis): Figure out the correct behavior to use here.
  EXPECT_EQ(frame_url_3, frame->current_url());

  // Now test for https://crbug.com/612713 to prevent an NC_IN_PAGE_NAVIGATION
  // renderer kill.

  // Go back.
  {
    TestNavigationObserver observer(shell()->web_contents(), 1);
    controller.GoBack();
    observer.Wait();
  }

  // Verify the process is still alive by running script.  We can't just call
  // IsRenderFrameLive after the navigation since it might not have disconnected
  // yet.
  EXPECT_TRUE(ExecJs(root->current_frame_host(), "true;"));
  EXPECT_TRUE(root->current_frame_host()->IsRenderFrameLive());

  // TODO(creis): It's a bit surprising to go to frame_url_1 here instead of
  // frame_url_2.  Perhaps we should be going back to frame_url_1 when going
  // back two entries above, since it's different than the initial blank case.
  EXPECT_EQ(frame_url_1, frame->current_url());
}

// Test for same document navigation kills when going back to about:blank after
// a document.write.  See https://crbug.com/446959.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       BackAfterIframeDocumentWrite) {
  GURL links_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html"));
  EXPECT_TRUE(NavigateToURL(shell(), links_url));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  NavigationController& controller = shell()->web_contents()->GetController();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));

  // Add an iframe with no 'src'.
  GURL blank_url(url::kAboutBlankURL);
  std::string script =
      "var iframe = document.createElement('iframe');"
      "iframe.id = 'frame';"
      "document.body.appendChild(iframe);";
  EXPECT_TRUE(ExecJs(root->current_frame_host(), script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  ASSERT_EQ(1U, root->child_count());
  FrameTreeNode* frame = root->child_at(0);
  ASSERT_NE(nullptr, frame);
  EXPECT_EQ(blank_url, frame->current_url());

  // Do a document.write in the subframe to create a link to click.
  std::string document_write_script =
      "var iframe = document.getElementById('frame');"
      "iframe.contentWindow.document.write("
      "    \"<a id='fraglink' href='#frag'>fragment link</a>\");"
      "iframe.contentWindow.document.close();";
  EXPECT_TRUE(ExecJs(root->current_frame_host(), document_write_script));

  // Click the link to do a same document navigation.  Due to the
  // document.write, the new URL matches the parent frame's URL.
  GURL frame_url_2(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_links.html#frag"));
  std::string link_script = "document.getElementById('fraglink').click()";
  EXPECT_TRUE(ExecJs(frame->current_frame_host(), link_script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(2, EvalJs(shell(), "history.length"));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(frame_url_2, frame->current_url());

  // Go back.
  {
    TestNavigationObserver observer(shell()->web_contents(), 1);
    controller.GoBack();
    observer.Wait();
  }

  // Verify the process is still alive by running script.  We can't just call
  // IsRenderFrameLive after the navigation since it might not have disconnected
  // yet.
  EXPECT_TRUE(ExecJs(root->current_frame_host(), "true;"));
  EXPECT_TRUE(root->current_frame_host()->IsRenderFrameLive());

  EXPECT_EQ(blank_url, frame->current_url());
}

// Test for same document navigation kills when going back to about:blank in an
// iframe of a data URL, after a document.write.  This differs from
// BackAfterIframeDocumentWrite because both about:blank and the data URL are
// considered unique origins.  See https://crbug.com/446959.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       BackAfterIframeDocumentWriteInDataURL) {
  GURL data_url("data:text/html,Top level page");
  EXPECT_TRUE(NavigateToURL(shell(), data_url));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  NavigationController& controller = shell()->web_contents()->GetController();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(shell(), "history.length"));
  const url::Origin opaque_origin = root->current_origin();
  EXPECT_TRUE(opaque_origin.opaque());
  EXPECT_EQ(url::SchemeHostPort(),
            opaque_origin.GetTupleOrPrecursorTupleIfOpaque());

  // Add an iframe with no 'src'.
  GURL blank_url(url::kAboutBlankURL);
  std::string script =
      "var iframe = document.createElement('iframe');"
      "iframe.id = 'frame';"
      "document.body.appendChild(iframe);";
  EXPECT_TRUE(ExecJs(root, script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(1, EvalJs(root, "history.length"));
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  ASSERT_EQ(1U, root->child_count());
  FrameTreeNode* frame = root->child_at(0);
  ASSERT_NE(nullptr, frame);
  EXPECT_EQ(blank_url, frame->current_url());
  EXPECT_EQ(opaque_origin, root->current_origin());
  EXPECT_EQ(opaque_origin, frame->current_origin());

  // Do a document.write in the subframe to create a link to click.
  std::string html = "<a id='fraglink' href='#frag'>fragment link</a>";
  std::string document_write_script = JsReplace(
      "var iframe = document.getElementById('frame');"
      "iframe.contentWindow.document.write($1);"
      "iframe.contentWindow.document.close();",
      html);
  EXPECT_TRUE(ExecJs(root, document_write_script));
  EXPECT_EQ(opaque_origin, root->current_origin());
  EXPECT_EQ(opaque_origin, frame->current_origin());

  // Click the link to do a same document navigation.  Due to the
  // document.write, the new URL matches the parent frame's URL, but the
  // opaque origin is preserved.
  GURL frame_url_2("data:text/html,Top level page#frag");
  std::string link_script = "document.getElementById('fraglink').click()";
  EXPECT_TRUE(ExecJs(frame, link_script));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(opaque_origin, root->current_origin());
  EXPECT_EQ(opaque_origin, frame->current_origin());
  EXPECT_EQ(ListValueOf("Top level page", "fragment link"),
            EvalJs(frame,
                   "[window.parent.document.body.textContent,"
                   " document.body.textContent]"))
      << "Frames should be same-origin and able to script each other.";
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(2, EvalJs(root, "history.length"));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(frame_url_2, frame->current_url());

  // Go back.
  {
    TestNavigationObserver observer(shell()->web_contents(), 1);
    controller.GoBack();
    observer.Wait();
  }

  // Verify the process is still alive by running script.  We can't just call
  // IsRenderFrameLive after the navigation since it might not have disconnected
  // yet.
  EXPECT_EQ("ping", EvalJs(root, "'ping'"));
  EXPECT_TRUE(root->current_frame_host()->IsRenderFrameLive());

  EXPECT_EQ(blank_url, frame->current_url());
  EXPECT_EQ(opaque_origin, frame->current_origin());
}

// Ensure that we do not corrupt a NavigationEntry's PageState if a subframe
// forward navigation commits after we've already started another forward
// navigation in the main frame.  See https://crbug.com/597322.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ForwardInSubframeWithPendingForward) {
  // Navigate to a page with an iframe.
  GURL url_a(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_data_iframe.html"));
  GURL frame_url_a1("data:text/html,Subframe");
  EXPECT_TRUE(NavigateToURL(shell(), url_a));

  NavigationController& controller = shell()->web_contents()->GetController();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(1U, root->child_count());
  EXPECT_EQ(url_a, root->current_url());
  FrameTreeNode* frame = root->child_at(0);
  EXPECT_EQ(frame_url_a1, frame->current_url());

  // Navigate the iframe to a second page.
  GURL frame_url_a2 = embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html");
  NavigateFrameToURL(frame, frame_url_a2);

  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_a, root->current_url());
  EXPECT_EQ(frame_url_a2, frame->current_url());

  // Navigate the top-level frame to another page with an iframe.
  GURL url_b(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe.html"));
  GURL frame_url_b1(url::kAboutBlankURL);
  EXPECT_TRUE(NavigateToURL(shell(), url_b));
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(url_b, root->current_url());
  EXPECT_EQ(frame_url_b1, root->child_at(0)->current_url());

  // Go back two entries. The original frame URL should be back.
  ASSERT_TRUE(controller.CanGoToOffset(-2));
  controller.GoToOffset(-2);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_a, root->current_url());
  EXPECT_EQ(frame_url_a1, root->child_at(0)->current_url());

  // Go forward two times in a row, being careful that the subframe commits
  // after the second forward navigation begins but before the main frame
  // commits.
  FrameTestNavigationManager subframe_delayer(
      root->child_at(0)->frame_tree_node_id(), shell()->web_contents(),
      frame_url_a2);
  TestNavigationManager mainframe_delayer(shell()->web_contents(), url_b);
  controller.GoForward();
  EXPECT_TRUE(subframe_delayer.WaitForRequestStart());
  controller.GoForward();
  EXPECT_TRUE(mainframe_delayer.WaitForRequestStart());
  EXPECT_EQ(2, controller.GetPendingEntryIndex());

  // Let the subframe commit.
  subframe_delayer.WaitForNavigationFinished();
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_a, root->current_url());
  EXPECT_EQ(frame_url_a2, root->child_at(0)->current_url());

  // Let the main frame commit.
  mainframe_delayer.WaitForNavigationFinished();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_b, root->current_url());
  EXPECT_EQ(frame_url_b1, root->child_at(0)->current_url());

  // Check the PageState of the previous entry to ensure it isn't corrupted.
  NavigationEntry* entry = controller.GetEntryAtIndex(1);
  EXPECT_EQ(url_a, entry->GetURL());
  ExplodedPageState exploded_state;
  EXPECT_TRUE(
      DecodePageState(entry->GetPageState().ToEncodedData(), &exploded_state));
  EXPECT_EQ(url_a,
            GURL(exploded_state.top.url_string.value_or(base::string16())));
  EXPECT_EQ(frame_url_a2,
            GURL(exploded_state.top.children.at(0).url_string.value_or(
                base::string16())));
}

// Start a provisional navigation, but abort it by going back before it commits.
// In crbug.com/631617 there was an issue which cleared the
// pending_navigation_params_ in RenderFrameImpl. This caused the interrupting
// navigation to lose important navigation data like its nav_entry_id, which
// could cause it to commit in-place instead of in the correct location in the
// browsing history.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       AbortProvisionalLoadRetainsNavigationParams) {
  EXPECT_TRUE(
      NavigateToURL(shell(), embedded_test_server()->GetURL("/title1.html")));
  EXPECT_TRUE(
      NavigateToURL(shell(), embedded_test_server()->GetURL("/title2.html")));

  TestNavigationManager delayer(shell()->web_contents(),
                                embedded_test_server()->GetURL("/title3.html"));
  shell()->LoadURL(embedded_test_server()->GetURL("/title3.html"));
  EXPECT_TRUE(delayer.WaitForRequestStart());

  NavigationController& controller = shell()->web_contents()->GetController();

  TestNavigationManager back_manager(
      shell()->web_contents(), embedded_test_server()->GetURL("/title1.html"));
  controller.GoBack();
  back_manager.WaitForNavigationFinished();

  EXPECT_TRUE(controller.CanGoForward());
  EXPECT_EQ(0, controller.GetCurrentEntryIndex());
}

// Make sure that a 304 response to a navigation aborts the navigation.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, NavigateTo304) {
  // URL that just returns a blank page.
  GURL initial_url = embedded_test_server()->GetURL("/set-header");
  // URL that returns a response with a 304 status code.
  GURL not_modified_url = embedded_test_server()->GetURL("/echo?status=304");

  EXPECT_TRUE(NavigateToURL(shell(), initial_url));
  EXPECT_EQ(initial_url, shell()->web_contents()->GetVisibleURL());

  // The navigation should be aborted.
  EXPECT_FALSE(NavigateToURL(shell(), not_modified_url));
  EXPECT_EQ(initial_url, shell()->web_contents()->GetVisibleURL());
}

// Ensure that we do not corrupt a NavigationEntry's PageState if two forward
// navigations compete in different frames.  See https://crbug.com/623319.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       PageStateAfterForwardInCompetingFrames) {
  // Navigate to a page with an iframe.
  GURL url_a(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_data_iframe.html"));
  GURL frame_url_a1("data:text/html,Subframe");
  EXPECT_TRUE(NavigateToURL(shell(), url_a));

  NavigationController& controller = shell()->web_contents()->GetController();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  EXPECT_EQ(url_a, root->current_url());
  EXPECT_EQ(frame_url_a1, root->child_at(0)->current_url());

  // Navigate the iframe to a second page.
  GURL frame_url_a2 = embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html");
  NavigateFrameToURL(root->child_at(0), frame_url_a2);

  // Navigate the iframe to about:blank.
  GURL blank_url(url::kAboutBlankURL);
  NavigateFrameToURL(root->child_at(0), blank_url);
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_a, root->current_url());
  EXPECT_EQ(blank_url, root->child_at(0)->current_url());

  // Go back to the middle entry.
  controller.GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Replace the entry with a cross-site top-level page.  By doing a
  // replacement, the main frame pages before and after have the same item
  // sequence number, and thus going between them only requires loads in the
  // subframe.
  GURL url_b(embedded_test_server()->GetURL(
      "b.com", "/navigation_controller/simple_page_2.html"));
  std::string replace_script = "location.replace('" + url_b.spec() + "')";
  TestNavigationObserver replace_observer(shell()->web_contents());
  EXPECT_TRUE(ExecJs(shell()->web_contents(), replace_script));
  replace_observer.Wait();
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_b, root->current_url());

  // Go back to the original page.
  controller.GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  // Navigate forward twice using script.  In https://crbug.com/623319, this
  // caused a mismatch between the NavigationEntry's URL and PageState.
  EXPECT_TRUE(
      ExecJs(shell()->web_contents(), "history.forward(); history.forward();"));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_b, root->current_url());
  NavigationEntry* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(url_b, entry->GetURL());
  ExplodedPageState exploded_state;
  EXPECT_TRUE(
      DecodePageState(entry->GetPageState().ToEncodedData(), &exploded_state));
  EXPECT_EQ(url_b,
            GURL(exploded_state.top.url_string.value_or(base::string16())));
  EXPECT_EQ(0U, exploded_state.top.children.size());

  // Go back and then forward to see if the PageState loads correctly.
  controller.GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  controller.GoForward();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  // We should be on url_b, and the renderer process shouldn't be killed.
  ASSERT_TRUE(root->current_frame_host()->IsRenderFrameLive());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_b, shell()->web_contents()->GetVisibleURL());
  EXPECT_EQ(url_b, root->current_url());
  EXPECT_EQ(0U, root->child_count());
}

// Ensure that we do not corrupt a NavigationEntry's PageState if two forward
// navigations compete in different frames, and the main frame entry contains an
// iframe of its own.  See https://crbug.com/623319.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       PageStateWithIframeAfterForwardInCompetingFrames) {
  // Navigate to a page with an iframe.
  GURL url_a(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_data_iframe.html"));
  GURL data_url("data:text/html,Subframe");
  EXPECT_TRUE(NavigateToURL(shell(), url_a));

  NavigationController& controller = shell()->web_contents()->GetController();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  EXPECT_EQ(url_a, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());

  // Navigate the iframe to a first real page.
  GURL frame_url_a1 = embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html");
  NavigateFrameToURL(root->child_at(0), frame_url_a1);

  // Navigate the iframe to a second real page.
  GURL frame_url_a2 = embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html");
  NavigateFrameToURL(root->child_at(0), frame_url_a2);
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_a, root->current_url());
  EXPECT_EQ(frame_url_a2, root->child_at(0)->current_url());

  // Go back to the middle entry.
  controller.GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Replace the entry with a cross-site top-level page with an iframe.  By
  // doing a replacement, the main frame pages before and after have the same
  // item sequence number, and thus going between them only requires loads in
  // the subframe.
  GURL url_b(embedded_test_server()->GetURL(
      "b.com", "/navigation_controller/page_with_data_iframe.html"));
  std::string replace_script = "location.replace('" + url_b.spec() + "')";
  TestNavigationObserver replace_observer(shell()->web_contents());
  EXPECT_TRUE(ExecJs(shell()->web_contents(), replace_script));
  replace_observer.Wait();
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_b, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());

  // Go back to the original page.
  controller.GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  // Navigate forward twice using script.  This will race, but in either outcome
  // we want to ensure that the subframes target entry index 1 and not 2.  In
  // https://crbug.com/623319, the subframes targeted the wrong entry, leading
  // to a URL spoof and renderer kill.
  EXPECT_TRUE(
      ExecJs(shell()->web_contents(), "history.forward(); history.forward();"));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_TRUE(root->current_frame_host()->IsRenderFrameLive());
  EXPECT_EQ(url_b, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());
  NavigationEntry* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(url_b, entry->GetURL());
  ExplodedPageState exploded_state;
  EXPECT_TRUE(
      DecodePageState(entry->GetPageState().ToEncodedData(), &exploded_state));
  EXPECT_EQ(url_b,
            GURL(exploded_state.top.url_string.value_or(base::string16())));

  // Go back and then forward to see if the PageState loads correctly.
  controller.GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  controller.GoForward();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  // We should be on url_b, and the renderer process shouldn't be killed.
  ASSERT_TRUE(root->current_frame_host()->IsRenderFrameLive());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_b, shell()->web_contents()->GetVisibleURL());
  EXPECT_EQ(url_b, root->current_url());
  EXPECT_EQ(data_url, root->child_at(0)->current_url());
}

// Ensure that forward navigations in cloned tabs can commit if they redirect to
// a different site than before.  This causes the navigation's item sequence
// number to change, meaning that we can't use it for determining whether the
// commit matches the history item.  See https://crbug.com/600238.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ForwardRedirectWithNoCommittedEntry) {
  NavigationController& controller = shell()->web_contents()->GetController();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // Put 2 pages in history.
  GURL url_1(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url_1));

  GURL url_2(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url_2));

  EXPECT_EQ(url_2, root->current_url());
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Do a replaceState to a URL that will redirect when we come back to it via
  // session history.
  GURL url_3(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/page_with_links.html"));
  {
    TestNavigationObserver observer(shell()->web_contents());
    std::string script =
        "history.replaceState({}, '', '/server-redirect?" + url_3.spec() + "')";
    EXPECT_TRUE(ExecJs(root, script));
    observer.Wait();
  }

  // Go back.
  controller.GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_1, root->current_url());

  // Clone the tab without navigating it.
  std::unique_ptr<WebContents> new_tab = shell()->web_contents()->Clone();
  WebContentsImpl* new_tab_impl = static_cast<WebContentsImpl*>(new_tab.get());
  NavigationController& new_controller = new_tab_impl->GetController();
  FrameTreeNode* new_root = new_tab_impl->GetFrameTree()->root();
  EXPECT_TRUE(new_controller.IsInitialNavigation());
  EXPECT_TRUE(new_controller.NeedsReload());

  // Go forward in the new tab.
  {
    TestNavigationObserver observer(new_tab.get());
    new_controller.GoForward();
    observer.Wait();
  }
  EXPECT_TRUE(new_root->current_frame_host()->IsRenderFrameLive());
  EXPECT_EQ(url_3, new_root->current_url());
}

// Ensure that we can support cross-process navigations in subframes due to
// redirects.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       SubframeForwardRedirect) {
  NavigationController& controller = shell()->web_contents()->GetController();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  GURL url_1(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/page_with_data_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url_1));

  GURL frame_url(embedded_test_server()->GetURL(
      "foo.com", "/navigation_controller/simple_page_1.html"));
  NavigateFrameToURL(root->child_at(0), frame_url);

  EXPECT_EQ(url_1, root->current_url());
  EXPECT_EQ(frame_url, root->child_at(0)->current_url());
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Do a replaceState to a URL that will redirect cross-site when we come back
  // to it via session history.
  GURL frame_url2(embedded_test_server()->GetURL(
      "bar.com", "/navigation_controller/simple_page_2.html"));
  {
    TestNavigationObserver observer(shell()->web_contents());
    std::string script = "history.replaceState({}, '', '/server-redirect?" +
                         frame_url2.spec() + "')";
    EXPECT_TRUE(ExecJs(root->child_at(0), script));
    observer.Wait();
  }

  // Go back.
  {
    TestNavigationObserver observer(shell()->web_contents());
    controller.GoBack();
    observer.Wait();
  }
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url_1, root->current_url());

  // Go forward.
  {
    TestNavigationObserver observer(shell()->web_contents());
    controller.GoForward();
    observer.Wait();
  }
  EXPECT_TRUE(root->current_frame_host()->IsRenderFrameLive());
  EXPECT_TRUE(root->child_at(0)->current_frame_host()->IsRenderFrameLive());
  EXPECT_EQ(url_1, root->current_url());
  EXPECT_EQ(frame_url2, root->child_at(0)->current_url());
  if (AreAllSitesIsolatedForTesting()) {
    EXPECT_EQ(GURL("http://bar.com"), root->child_at(0)
                                          ->current_frame_host()
                                          ->GetSiteInstance()
                                          ->GetSiteURL());
  }
}

// Tests that when using FrameNavigationEntries, knowledge of POST navigations
// is recorded on a subframe level.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       PostInSubframe) {
  GURL page_with_form_url = embedded_test_server()->GetURL(
      "/navigation_controller/subframe_form.html");
  EXPECT_TRUE(NavigateToURL(shell(), page_with_form_url));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  FrameTreeNode* frame = root->child_at(0);
  EXPECT_EQ(1, controller.GetEntryCount());

  {
    NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
    FrameNavigationEntry* root_entry = entry->GetFrameEntry(root);
    FrameNavigationEntry* frame_entry = entry->GetFrameEntry(frame);
    EXPECT_NE(nullptr, root_entry);
    EXPECT_NE(nullptr, frame_entry);
    EXPECT_EQ("GET", root_entry->method());
    EXPECT_EQ(-1, root_entry->post_id());
    EXPECT_EQ("GET", frame_entry->method());
    EXPECT_EQ(-1, frame_entry->post_id());
    EXPECT_FALSE(entry->GetHasPostData());
    EXPECT_EQ(-1, entry->GetPostID());
  }

  // Submit the form.
  TestNavigationObserver observer(shell()->web_contents(), 1);
  ExecuteScriptAsync(shell(), "submitForm('isubmit')");
  observer.Wait();

  EXPECT_EQ(2, controller.GetEntryCount());
  {
    NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
    FrameNavigationEntry* root_entry = entry->GetFrameEntry(root);
    FrameNavigationEntry* frame_entry = entry->GetFrameEntry(frame);
    EXPECT_NE(nullptr, root_entry);
    EXPECT_NE(nullptr, frame_entry);
    EXPECT_EQ("GET", root_entry->method());
    EXPECT_EQ(-1, root_entry->post_id());
    EXPECT_EQ("POST", frame_entry->method());
    EXPECT_NE(-1, frame_entry->post_id());
    EXPECT_FALSE(entry->GetHasPostData());
    EXPECT_EQ(-1, entry->GetPostID());
  }
}

// Tests that POST body is not lost when decidePolicyForNavigation tells the
// renderer to route the request via FrameHostMsg_OpenURL sent to the browser.
// See also https://crbug.com/344348.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, PostViaOpenUrlMsg) {
  GURL main_url(
      embedded_test_server()->GetURL("/form_that_posts_to_echoall.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));

  // Ask the renderer to go through OpenURL FrameHostMsg_OpenURL IPC message.
  // Without this, the test wouldn't repro https://crbug.com/344348.
  shell()
      ->web_contents()
      ->GetMutableRendererPrefs()
      ->browser_handles_all_top_level_requests = true;
  shell()->web_contents()->GetRenderViewHost()->SyncRendererPrefs();

  // Submit the form.
  TestNavigationObserver form_post_observer(shell()->web_contents(), 1);
  EXPECT_TRUE(ExecJs(shell()->web_contents(),
                     "document.getElementById('form').submit();"));
  form_post_observer.Wait();

  // Verify that we arrived at the expected location.
  GURL target_url(embedded_test_server()->GetURL("/echoall"));
  EXPECT_EQ(target_url, shell()->web_contents()->GetLastCommittedURL());

  // Verify that POST body was correctly passed to the server and ended up in
  // the body of the page.
  EXPECT_EQ(
      "text=value\n",
      EvalJs(shell(), "document.getElementsByTagName('pre')[0].innerText"));
}

// This test verifies that reloading a POST request that is uncacheable won't
// incorrectly result in a GET request.  This is a regression test for
// https://crbug.com/860807.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, UncacheablePost) {
  GURL main_url(embedded_test_server()->GetURL(
      "/form_that_posts_to_echoall_nocache.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  WebContents* web_contents = shell()->web_contents();
  EXPECT_EQ(0, web_contents->GetController().GetLastCommittedEntryIndex());

  // Submit the form.
  TestNavigationObserver form_post_observer(web_contents, 1);
  EXPECT_TRUE(
      ExecuteScript(web_contents, "document.getElementById('form').submit();"));
  form_post_observer.Wait();

  // Verify that we arrived at the expected location.
  GURL target_url(embedded_test_server()->GetURL("/echoall/nocache"));
  EXPECT_EQ(target_url, web_contents->GetLastCommittedURL());
  EXPECT_EQ(1, web_contents->GetController().GetLastCommittedEntryIndex());

  // Verify that this was a POST request.
  std::string request_headers;
  EXPECT_TRUE(ExecuteScriptAndExtractString(
      web_contents,
      "window.domAutomationController.send("
      "document.getElementsByTagName('pre')[1].innerText);",
      &request_headers));
  EXPECT_THAT(request_headers, ::testing::HasSubstr("POST /echoall/nocache"));

  // Verify that POST body was correctly passed to the server and ended up in
  // the body of the page.
  std::string body;
  EXPECT_TRUE(ExecuteScriptAndExtractString(
      web_contents,
      "window.domAutomationController.send("
      "document.getElementsByTagName('pre')[0].innerText);",
      &body));
  EXPECT_EQ("text=value\n", body);

  // Extract the response nonce.
  std::string old_response_nonce;
  std::string response_nonce_extraction_script = R"(
      domAutomationController.send(
          document.getElementById('response-nonce').innerText); )";
  EXPECT_TRUE(ExecuteScriptAndExtractString(
      web_contents, response_nonce_extraction_script, &old_response_nonce));

  // Go back.
  {
    TestNavigationObserver observer(web_contents);
    web_contents->GetController().GoBack();
    observer.Wait();
  }
  EXPECT_EQ(main_url, web_contents->GetLastCommittedURL());
  EXPECT_EQ(0, web_contents->GetController().GetLastCommittedEntryIndex());

  // Go forward.
  {
    TestNavigationObserver navigation_observer(web_contents);
    NavigationHandleObserver handle_observer(web_contents, target_url);
    web_contents->GetController().GoForward();
    navigation_observer.Wait();

    // Verify that the previous response response really was treated as
    // uncacheable.
    EXPECT_TRUE(handle_observer.is_error());
    EXPECT_EQ(net::ERR_CACHE_MISS, handle_observer.net_error_code());
  }
  EXPECT_EQ(target_url, web_contents->GetLastCommittedURL());
  EXPECT_EQ(1, web_contents->GetController().GetLastCommittedEntryIndex());

  // Reload
  {
    TestNavigationObserver observer(web_contents);
    web_contents->GetController().Reload(content::ReloadType::NORMAL,
                                         false);  // check_for_repost
    observer.Wait();
  }
  EXPECT_EQ(target_url, web_contents->GetLastCommittedURL());
  EXPECT_EQ(1, web_contents->GetController().GetLastCommittedEntryIndex());

  // MAIN VERIFICATION for https://crbug.com/860807: Verify that the reload was
  // a POST request.
  EXPECT_TRUE(ExecuteScriptAndExtractString(
      web_contents,
      "window.domAutomationController.send("
      "document.getElementsByTagName('pre')[1].innerText);",
      &request_headers));
  EXPECT_THAT(request_headers, ::testing::HasSubstr("POST /echoall/nocache"));

  // Verify that POST body was correctly passed to the server and ended up in
  // the body of the page.  This is supplementary verification against
  // https://crbug.com/860807.
  EXPECT_TRUE(ExecuteScriptAndExtractString(
      web_contents,
      "window.domAutomationController.send("
      "document.getElementsByTagName('pre')[0].innerText);",
      &body));
  EXPECT_EQ("text=value\n", body);

  // Extract the new response nonce and verify that it did change (e.g. that the
  // reload did load fresh content).
  std::string new_response_nonce;
  EXPECT_TRUE(ExecuteScriptAndExtractString(
      web_contents, response_nonce_extraction_script, &new_response_nonce));
  EXPECT_NE(new_response_nonce, old_response_nonce);
}

// This test verifies that it is possible to reload a POST request that
// initially failed (e.g. because the network was offline or the host was
// unreachable during the initial navigation).  This is a regression test for
// https://crbug.com/869117.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ReloadOfInitiallyFailedPost) {
  GURL main_url(embedded_test_server()->GetURL(
      "/form_that_posts_to_echoall_nocache.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  WebContents* web_contents = shell()->web_contents();
  EXPECT_EQ(0, web_contents->GetController().GetLastCommittedEntryIndex());

  // Submit the form while simulating "network down" conditions.
  GURL target_url(embedded_test_server()->GetURL("/echoall/nocache"));
  {
    std::unique_ptr<URLLoaderInterceptor> interceptor =
        URLLoaderInterceptor::SetupRequestFailForURL(
            target_url, net::ERR_INTERNET_DISCONNECTED);
    TestNavigationObserver form_post_observer(web_contents, 1);
    EXPECT_TRUE(ExecuteScript(web_contents,
                              "document.getElementById('form').submit();"));
    form_post_observer.Wait();
  }
  EXPECT_EQ(target_url, web_contents->GetLastCommittedURL());
  EXPECT_EQ(1, web_contents->GetController().GetLastCommittedEntryIndex());

  // Reload
  {
    TestNavigationObserver observer(web_contents);
    web_contents->GetController().Reload(content::ReloadType::NORMAL,
                                         false);  // check_for_repost
    observer.Wait();
  }
  EXPECT_EQ(target_url, web_contents->GetLastCommittedURL());
  EXPECT_EQ(1, web_contents->GetController().GetLastCommittedEntryIndex());

  // Verify that the reload was a POST request.
  std::string request_headers;
  EXPECT_TRUE(ExecuteScriptAndExtractString(
      web_contents,
      "window.domAutomationController.send("
      "document.getElementsByTagName('pre')[1].innerText);",
      &request_headers));
  EXPECT_THAT(request_headers, ::testing::HasSubstr("POST /echoall/nocache"));

  // Verify that POST body was correctly passed to the server and ended up in
  // the body of the page.
  std::string body;
  EXPECT_TRUE(ExecuteScriptAndExtractString(
      web_contents,
      "window.domAutomationController.send("
      "document.getElementsByTagName('pre')[0].innerText);",
      &body));
  EXPECT_EQ("text=value\n", body);
}

// Tests that inserting a named subframe into the FrameTree clears any
// previously existing FrameNavigationEntry objects for the same name.
// See https://crbug.com/628677.
// Crashes/fails inconsistently on windows and ChromeOS:
// https://crbug.com/783806.
#if defined(OS_WIN) || defined(OS_CHROMEOS)
#define MAYBE_EnsureFrameNavigationEntriesClearedOnMismatch \
  DISABLED_EnsureFrameNavigationEntriesClearedOnMismatch
#else
#define MAYBE_EnsureFrameNavigationEntriesClearedOnMismatch \
  EnsureFrameNavigationEntriesClearedOnMismatch
#endif
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       MAYBE_EnsureFrameNavigationEntriesClearedOnMismatch) {
  WebContentsImpl* web_contents =
      static_cast<WebContentsImpl*>(shell()->web_contents());
  NavigationControllerImpl& controller = web_contents->GetController();
  FrameTreeNode* root = web_contents->GetFrameTree()->root();

  // Start by navigating to a page with complex frame hierarchy.
  GURL start_url(embedded_test_server()->GetURL("/frame_tree/top.html"));
  EXPECT_TRUE(NavigateToURL(shell(), start_url));
  EXPECT_EQ(3U, root->child_count());
  EXPECT_EQ(2U, root->child_at(0)->child_count());

  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();

  // Verify only the parts of the NavigationEntry affected by this test.
  {
    // * Main frame has 3 subframes.
    FrameNavigationEntry* root_entry = entry->GetFrameEntry(root);
    EXPECT_NE(nullptr, root_entry);
    EXPECT_EQ("", root_entry->frame_unique_name());
    EXPECT_EQ(3U, entry->root_node()->children.size());
    EXPECT_EQ(2U, entry->root_node()->children[0]->children.size());

    // * The first child of the main frame is named and has two more children.
    FrameTreeNode* frame = root->child_at(0)->child_at(0);
    NavigationEntryImpl::TreeNode* tree_node = entry->GetTreeNode(frame);
    FrameNavigationEntry* frame_entry = entry->GetFrameEntry(frame);
    EXPECT_NE(nullptr, tree_node);
    EXPECT_NE(nullptr, frame_entry);
    EXPECT_EQ("1-1: 2-1: name", frame_entry->frame_unique_name());
    EXPECT_EQ(frame_entry, tree_node->frame_entry);
    EXPECT_EQ(0U, tree_node->children.size());
  }

  // Removing the first child of the main frame should remove the corresponding
  // FrameTreeNode.
  EXPECT_TRUE(ExecJs(root, kRemoveFrameScript));
  EXPECT_EQ(2U, root->child_count());

  // However, the FrameNavigationEntry objects for the frame that was removed
  // should still be around.
  {
    FrameNavigationEntry* root_entry = entry->GetFrameEntry(root);
    EXPECT_NE(nullptr, root_entry);
    EXPECT_EQ(3U, entry->root_node()->children.size());
    EXPECT_EQ(2U, entry->root_node()->children[0]->children.size());

    // Since child count is known only to the FrameNavigationEntry::TreeNode,
    // traverse the root entry to find the correct one matching the
    // frame_unique_name. The ordering of entries in the FrameNavigationEntry
    // tree is not guaranteed to be the same as the order in the FrameTreeNode
    // tree. The latter depends on the order of frames committing navigations,
    // which is undefined and depends on responses from the network.
    // Traverse the FrameNavigationEntry tree, since the FrameTreeNode has
    // been deleted and cannot be used for looking up the TreeNode.
    NavigationEntryImpl::TreeNode* tree_node = nullptr;
    for (auto& node : entry->root_node()->children[0]->children) {
      if (node->frame_entry->frame_unique_name() == "1-1: 2-1: name") {
        tree_node = node.get();
        break;
      }
    }
    EXPECT_TRUE(tree_node);
    EXPECT_EQ(0U, tree_node->children.size());
  }

  // Now, insert a frame with the same name as the previously removed one
  // at a different layer of the frame tree.
  FrameTreeNode* subframe = root->child_at(1)->child_at(1)->child_at(0);
  EXPECT_EQ(2U, root->child_at(1)->child_count());
  EXPECT_EQ(0U, subframe->child_count());
  std::string add_matching_name_frame_script =
      "var f = document.createElement('iframe');"
      "f.name = '1-1-name';"
      "f.src = '1-1.html';"
      "document.body.appendChild(f);";
  TestNavigationObserver observer(web_contents, 1);
  EXPECT_TRUE(ExecJs(subframe, add_matching_name_frame_script));
  EXPECT_EQ(1U, subframe->child_count());
  observer.Wait();

  // Verify that the FrameNavigationEntry for the original frame is now gone.
  {
    FrameNavigationEntry* root_entry = entry->GetFrameEntry(root);
    EXPECT_NE(nullptr, root_entry);
    EXPECT_EQ(3U, entry->root_node()->children.size());

    // Both children of |entry->root_node()->children[0]| should be removed by
    // NavigationEntryImpl::RemoveEntryForFrame, because both will have
    // colliding unique names (the removed parent and the newly added frame both
    // load '1-1.html' - which has 2 named framse).
    EXPECT_EQ(0U, entry->root_node()->children[0]->children.size());
  }
}

// This test ensures that the comparison of tree position between a
// FrameTreeNode and FrameNavigationEntry works correctly for matching
// first-level frames.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       EnsureFirstLevelFrameNavigationEntriesMatch) {
  WebContentsImpl* web_contents =
      static_cast<WebContentsImpl*>(shell()->web_contents());
  FrameTreeNode* root = web_contents->GetFrameTree()->root();

  GURL start_url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), start_url));
  NavigationEntryImpl* nav_entry =
      web_contents->GetController().GetLastCommittedEntry();

  // Add, then remove a named frame. It will create a FrameNavigationEntry
  // for the name and remove it (since this is a frame created by script).
  EXPECT_TRUE(ExecuteScript(root, kAddNamedFrameScript));
  EXPECT_EQ(1U, root->child_count());
  EXPECT_EQ(1U, nav_entry->root_node()->children.size());
  // |tree_node| will becoma a dangling pointer when the frame is removed below.
  auto* tree_node = nav_entry->root_node()->children[0].get();

  EXPECT_TRUE(ExecJs(root, kRemoveFrameScript));
  EXPECT_EQ(0U, root->child_count());
  EXPECT_EQ(0U, nav_entry->root_node()->children.size());

  // Add another frame with the same name as before. The matching logic should
  // NOT consider them the same and should NOT result in the
  // FrameNavigationEntry being reused (because the frame injected by javascript
  // will get a fresh, random unique name each time it is created or recreated).
  EXPECT_TRUE(ExecuteScript(root, kAddNamedFrameScript));
  EXPECT_EQ(1U, root->child_count());
  EXPECT_EQ(1U, nav_entry->root_node()->children.size());
  EXPECT_NE(tree_node, nav_entry->root_node()->children[0].get());

  EXPECT_TRUE(ExecJs(root, kRemoveFrameScript));
  EXPECT_EQ(0U, root->child_count());
}

// Test that navigations classified as SAME_PAGE properly update all the
// members of FrameNavigationEntry. If not, it is possible to get a mismatch
// between the origin and URL of a document as seen in
// https://crbug.com/630103.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       EnsureSamePageNavigationUpdatesFrameNavigationEntry) {
  WebContentsImpl* web_contents =
      static_cast<WebContentsImpl*>(shell()->web_contents());
  FrameTreeNode* root = web_contents->GetFrameTree()->root();

  // Navigate to a simple page and then perform a fragment change navigation.
  GURL start_url(embedded_test_server()->GetURL("a.com", "/title1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), start_url));

  GURL fragment_change_url(
      embedded_test_server()->GetURL("a.com", "/title1.html#foo"));
  EXPECT_TRUE(NavigateToURL(shell(), fragment_change_url));
  EXPECT_EQ(2, web_contents->GetController().GetEntryCount());

  // Replace the URL of the current NavigationEntry with one that will cause
  // a server redirect when loaded.
  {
    GURL redirect_dest_url(
        embedded_test_server()->GetURL("sub.a.com", "/simple_page.html"));
    TestNavigationObserver observer(web_contents);
    std::string script = "history.replaceState({}, '', '/server-redirect?" +
                         redirect_dest_url.spec() + "')";
    EXPECT_TRUE(ExecJs(root, script));
    observer.Wait();
  }

  // Simulate the user hitting Enter in the omnibox without changing the URL.
  {
    TestNavigationObserver observer(web_contents);
    web_contents->GetController().LoadURL(web_contents->GetLastCommittedURL(),
                                          Referrer(), ui::PAGE_TRANSITION_LINK,
                                          std::string());
    observer.Wait();
  }

  // Prior to fixing the issue, the above omnibox navigation (which is
  // classified as SAME_PAGE) was leaving the FrameNavigationEntry with the
  // same document sequence number as the previous entry but updates the URL.
  // Doing a back session history navigation now will cause the browser to
  // consider it as same document because of this matching document sequence
  // number and lead to a mismatch of origin and URL in the renderer process.
  {
    TestNavigationObserver observer(web_contents);
    web_contents->GetController().GoBack();
    observer.Wait();
  }

  // Verify the expected origin through JavaScript. It also has the additional
  // verification of the process also being still alive.
  EXPECT_EQ(url::Origin::Create(start_url).Serialize(),
            EvalJs(web_contents, "self.origin"));
}

// Helper to trigger a history-back navigation in the WebContents after the
// renderer has committed a same-process and cross-origin navigation to the
// given |url|, but before the browser side has had a chance to process the
// DidCommitProvisionalLoad message.
class HistoryNavigationBeforeCommitInjector
    : public DidCommitProvisionalLoadInterceptor {
 public:
  HistoryNavigationBeforeCommitInjector(WebContentsImpl* web_contents,
                                        const GURL& url)
      : DidCommitProvisionalLoadInterceptor(web_contents),
        did_trigger_history_navigation_(false),
        url_(url) {}
  ~HistoryNavigationBeforeCommitInjector() override {}

  bool did_trigger_history_navigation() const {
    return did_trigger_history_navigation_;
  }

 private:
  // DidCommitProvisionalLoadInterceptor:
  bool WillDispatchDidCommitProvisionalLoad(
      RenderFrameHost* render_frame_host,
      ::FrameHostMsg_DidCommitProvisionalLoad_Params* params,
      mojom::DidCommitProvisionalLoadInterfaceParamsPtr& interface_params)
      override {
    if (!render_frame_host->GetParent() && params->url == url_) {
      did_trigger_history_navigation_ = true;
      web_contents()->GetController().GoBack();
    }
    return true;
  }

  bool did_trigger_history_navigation_;
  GURL url_;

  DISALLOW_COPY_AND_ASSIGN(HistoryNavigationBeforeCommitInjector);
};

// Test which simulates a race condition between a cross-origin, same-process
// navigation and a same document session history navigation. When such a race
// occurs, the renderer will commit the cross-origin navigation, updating its
// version of the current document sequence number, and will send an IPC to the
// browser process. The session history navigation comes after the commit for
// the cross-origin navigation and updates the URL, but not the origin of the
// document. This results in mismatch between the two and causes the renderer
// process to be killed. See https://crbug.com/630103.
IN_PROC_BROWSER_TEST_F(
    NavigationControllerBrowserTest,
    RaceCrossOriginNavigationAndSameDocumentHistoryNavigation) {
  WebContentsImpl* web_contents =
      static_cast<WebContentsImpl*>(shell()->web_contents());
  FrameTreeNode* root = web_contents->GetFrameTree()->root();

  // Navigate to a simple page and then perform a same document navigation.
  GURL start_url(embedded_test_server()->GetURL("a.com", "/title1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), start_url));

  GURL same_document_url(
      embedded_test_server()->GetURL("a.com", "/title1.html#foo"));
  EXPECT_TRUE(NavigateToURL(shell(), same_document_url));
  EXPECT_EQ(2, web_contents->GetController().GetEntryCount());

  // Create a HistoryNavigationBeforeCommitInjector, which will perform a
  // GoBack() just before a cross-origin, same process navigation commits.
  GURL cross_origin_url(
      embedded_test_server()->GetURL("suborigin.a.com", "/title2.html"));
  HistoryNavigationBeforeCommitInjector trigger(web_contents, cross_origin_url);

  // Navigate cross-origin, waiting for the commit to occur.
  UrlCommitObserver cross_origin_commit_observer(root, cross_origin_url);
  UrlCommitObserver history_commit_observer(root, start_url);
  shell()->LoadURL(cross_origin_url);
  cross_origin_commit_observer.Wait();
  EXPECT_EQ(cross_origin_url, web_contents->GetLastCommittedURL());
  EXPECT_EQ(2, web_contents->GetController().GetLastCommittedEntryIndex());
  EXPECT_TRUE(trigger.did_trigger_history_navigation());

  // Wait for the back navigation to commit as well.
  history_commit_observer.Wait();
  EXPECT_EQ(start_url, web_contents->GetLastCommittedURL());
  EXPECT_EQ(0, web_contents->GetController().GetLastCommittedEntryIndex());
  EXPECT_EQ(3, web_contents->GetController().GetEntryCount());

  // Verify the expected origin through JavaScript. It also has the additional
  // verification of the process also being still alive.
  EXPECT_EQ(url::Origin::Create(start_url).Serialize(),
            EvalJs(web_contents, "self.origin"));
}

// Test that verifies that Referer and Origin http headers are correctly sent
// to the final destination of a cross-site POST with a few redirects thrown in.
// This test is somewhat related to https://crbug.com/635400.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       RefererAndOriginHeadersAfterRedirects) {
  // Navigate to the page with form that posts via 307 redirection to
  // |redirect_target_url| (cross-site from |form_url|).  Using 307 (rather than
  // 302) redirection is important to preserve the HTTP method and POST body.
  GURL form_url(embedded_test_server()->GetURL(
      "a.com", "/form_that_posts_cross_site.html"));
  GURL redirect_target_url(embedded_test_server()->GetURL("x.com", "/echoall"));
  EXPECT_TRUE(NavigateToURL(shell(), form_url));

  // Submit the form.  The page submitting the form is at 0, and will
  // go through 307 redirects from 1 -> 2 and 2 -> 3:
  // 0. http://a.com:.../form_that_posts_cross_site.html
  // 1. http://a.com:.../cross-site-307/i.com/cross-site-307/x.com/echoall
  // 2. http://i.com:.../cross-site-307/x.com/echoall
  // 3. http://x.com:.../echoall/
  TestNavigationObserver form_post_observer(shell()->web_contents(), 1);
  EXPECT_TRUE(
      ExecJs(shell(), "document.getElementById('text-form').submit();"));
  form_post_observer.Wait();

  // Verify that we arrived at the expected, redirected location.
  EXPECT_EQ(redirect_target_url,
            shell()->web_contents()->GetLastCommittedURL());

  // Get the http request headers.
  std::string headers =
      EvalJs(shell(), "document.getElementsByTagName('pre')[1].innerText")
          .ExtractString();

  // Verify the Origin and Referer headers.
  EXPECT_THAT(headers, ::testing::HasSubstr("Origin: null"));
  EXPECT_THAT(headers,
              ::testing::ContainsRegex(
                  "Referer: http://a.com:.*/form_that_posts_cross_site.html"));
}

// Check that the favicon is not cleared for same document navigations.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       SameDocumentNavigationDoesNotClearFavicon) {
  // Load a page and fake a favicon for it.
  NavigationController& controller = shell()->web_contents()->GetController();
  ASSERT_TRUE(NavigateToURL(
      shell(), embedded_test_server()->GetURL("/simple_page.html")));
  content::NavigationEntry* entry = controller.GetLastCommittedEntry();
  ASSERT_TRUE(entry);
  content::FaviconStatus& favicon_status = entry->GetFavicon();
  favicon_status.valid = true;

  ASSERT_TRUE(RendererLocationReplace(
      shell(), embedded_test_server()->GetURL(
                   "/simple_page.html#same-document-navigation")));
  entry = controller.GetLastCommittedEntry();
  content::FaviconStatus& favicon_status2 = entry->GetFavicon();
  EXPECT_TRUE(favicon_status2.valid);

  ASSERT_TRUE(RendererLocationReplace(
      shell(),
      embedded_test_server()->GetURL("/simple_page.html?new-navigation")));
  entry = controller.GetLastCommittedEntry();
  content::FaviconStatus& favicon_status3 = entry->GetFavicon();
  EXPECT_FALSE(favicon_status3.valid);
}

namespace {

// A BrowserMessageFilter that delays the FrameHostMsg_RunJavaScriptDialog IPC
// message until a commit happens on a given WebContents. This allows testing a
// race condition.
class AllowDialogIPCOnCommitFilter : public BrowserMessageFilter,
                                     public WebContentsDelegate {
 public:
  explicit AllowDialogIPCOnCommitFilter(WebContents* web_contents)
      : BrowserMessageFilter(FrameMsgStart),
        render_frame_host_(web_contents->GetMainFrame()) {
    web_contents_observer_.Observe(web_contents);
  }

 protected:
  ~AllowDialogIPCOnCommitFilter() override {}

 private:
  // BrowserMessageFilter:
  bool OnMessageReceived(const IPC::Message& message) override {
    DCHECK_CURRENTLY_ON(BrowserThread::IO);
    if (message.type() != FrameHostMsg_RunJavaScriptDialog::ID)
      return false;

    // Suspend the message.
    web_contents_observer_.SetCallback(
        base::Bind(&RenderFrameHost::OnMessageReceived,
                   base::Unretained(render_frame_host_), message));
    return true;
  }

  // WebContentsDelegate:
  JavaScriptDialogManager* GetJavaScriptDialogManager(
      WebContents* source) override {
    CHECK(false);
    return nullptr;  // agh compiler
  }

  // Separate because WebContentsObserver and BrowserMessageFilter each have an
  // OnMessageReceived function; this is the simplest way to disambiguate.
  class : public WebContentsObserver {
   public:
    using Callback = base::Callback<bool()>;

    using WebContentsObserver::Observe;

    void SetCallback(Callback callback) { callback_ = std::move(callback); }

   private:
    void DidFinishNavigation(NavigationHandle* navigation_handle) override {
      DCHECK_CURRENTLY_ON(BrowserThread::UI);
      if (!navigation_handle->HasCommitted())
        return;

      // Resume the message.
      callback_.Run();
    }

    Callback callback_;
  } web_contents_observer_;

  RenderFrameHost* render_frame_host_;

  DISALLOW_COPY_AND_ASSIGN(AllowDialogIPCOnCommitFilter);
};

}  // namespace

// Check that swapped out frames cannot spawn JavaScript dialogs.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       NoDialogsFromSwappedOutFrames) {
  // Start on a normal page.
  GURL url1 = embedded_test_server()->GetURL(
      "/navigation_controller/beforeunload_dialog.html");
  EXPECT_TRUE(NavigateToURL(shell(), url1));

  // Add a filter to allow us to force an IPC race.
  WebContents* web_contents = shell()->web_contents();
  scoped_refptr<AllowDialogIPCOnCommitFilter> filter =
      new AllowDialogIPCOnCommitFilter(web_contents);
  web_contents->SetDelegate(filter.get());
  web_contents->GetMainFrame()->GetProcess()->AddFilter(filter.get());

  // Use a chrome:// url to force the second page to be in a different process.
  GURL url2(std::string(kChromeUIScheme) + url::kStandardSchemeSeparator +
            kChromeUIGpuHost);
  EXPECT_TRUE(NavigateToURL(shell(), url2));

  // What happens now is that attempting to unload the first page will trigger a
  // JavaScript alert but allow navigation. The alert IPC will be suspended by
  // the message filter. The commit of the second page will unblock the IPC. If
  // the dialog IPC is allowed to spawn a dialog, the call by the WebContents to
  // its delegate to get the JavaScriptDialogManager will cause a CHECK and the
  // test will fail.
}

namespace {

// Execute JavaScript without the user gesture flag set, and wait for the
// triggered load finished.
void ExecuteJavaScriptAndWaitForLoadStop(WebContents* web_contents,
                                         const std::string script) {
  // WaitForLoadStop() does not work to wait for loading that is triggered by
  // JavaScript asynchronously.
  TestNavigationObserver observer(web_contents);

  // ExecJs() sets a user gesture flag internally for testing, but we
  // want to run JavaScript without the flag.  Call ExecuteJavaScriptForTests
  // directory.
  static_cast<WebContentsImpl*>(web_contents)
      ->GetMainFrame()
      ->ExecuteJavaScriptForTests(base::UTF8ToUTF16(script));

  observer.Wait();
}

}  // namespace

// Check if consecutive reloads can be correctly captured by metrics.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ConsecutiveReloadMetrics) {
  base::HistogramTester histogram;

  const char kReloadToReloadMetricName[] =
      "Navigation.Reload.ReloadToReloadDuration";
  const char kReloadMainResourceToReloadMetricName[] =
      "Navigation.Reload.ReloadMainResourceToReloadDuration";

  // Navigate to a page, and check if metrics are initialized correctly.
  EXPECT_TRUE(NavigateToURL(
      shell(), embedded_test_server()->GetURL(
                   "/navigation_controller/page_with_links.html")));
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 0);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 0);

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // Reload triggers a reload of ReloadType::NORMAL.  The first reload should
  // not be counted.
  controller.Reload(ReloadType::NORMAL, false);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 0);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 0);

  // Reload with ReloadType::BYPASSING_CACHE.  Both metrics should count the
  // consecutive reloads.
  controller.Reload(ReloadType::BYPASSING_CACHE, false);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 1);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 1);

  // Triggers another reload with ReloadType::BYPASSING_CACHE.
  // ReloadMainResourceToReload should not be counted here.
  controller.Reload(ReloadType::BYPASSING_CACHE, false);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 2);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 1);

  // A browser-initiated navigation should reset the reload tracking
  // information.
  EXPECT_TRUE(
      NavigateToURL(shell(), embedded_test_server()->GetURL(
                                 "/navigation_controller/simple_page_1.html")));
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 2);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 1);

  // Then, the next reload should be assumed as the first reload.  Metrics
  // should not be changed for the first reload.
  controller.Reload(ReloadType::NORMAL, false);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 2);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 1);

  // Another reload of ReloadType::NORMAL should be counted by both metrics
  // again.
  controller.Reload(ReloadType::NORMAL, false);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 3);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 2);

  // A renderer-initiated navigations with no user gesture don't reset reload
  // tracking information, and the following reload will be counted by metrics.
  ExecuteJavaScriptAndWaitForLoadStop(
      shell()->web_contents(),
      "history.pushState({}, 'page 1', 'simple_page_1.html')");
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 3);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 2);
  ExecuteJavaScriptAndWaitForLoadStop(shell()->web_contents(),
                                      "location.href='simple_page_2.html'");
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 3);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 2);

  controller.Reload(ReloadType::NORMAL, false);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 4);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 3);

  // Go back to the first page. Reload tracking information should be reset.
  shell()->web_contents()->GetController().GoBack();
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 4);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 3);

  controller.Reload(ReloadType::NORMAL, false);
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));
  histogram.ExpectTotalCount(kReloadToReloadMetricName, 4);
  histogram.ExpectTotalCount(kReloadMainResourceToReloadMetricName, 3);
}

// Check that the referrer is stored inside FrameNavigationEntry for subframes.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       RefererStoredForSubFrame) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  GURL url_simple(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe_simple.html"));
  GURL url_redirect(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe_redirect.html"));

  // Run this test twice: with and without a redirection.
  for (const GURL& url : {url_simple, url_redirect}) {
    // Navigate to a page with an iframe.
    EXPECT_TRUE(NavigateToURL(shell(), url));

    // Check the FrameNavigationEntry's referrer.
    NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
    ASSERT_EQ(1U, entry->root_node()->children.size());
    FrameNavigationEntry* frame_entry =
        entry->root_node()->children[0]->frame_entry.get();
    EXPECT_EQ(frame_entry->referrer().url, url);
  }
}

namespace {

class RequestMonitoringNavigationBrowserTest : public ContentBrowserTest {
 public:
  RequestMonitoringNavigationBrowserTest() : weak_factory_(this) {}

  const net::test_server::HttpRequest* FindAccumulatedRequest(
      const GURL& url_to_find) {
    DCHECK(url_to_find.SchemeIsHTTPOrHTTPS());

    auto it = std::find_if(
        accumulated_requests_.begin(), accumulated_requests_.end(),
        [&url_to_find](const net::test_server::HttpRequest& request) {
          return request.GetURL() == url_to_find;
        });
    if (it == accumulated_requests_.end())
      return nullptr;
    return &*it;
  }

 protected:
  void SetUpOnMainThread() override {
    // Accumulate all http requests made to |embedded_test_server| into
    // |accumulated_requests_| container.
    embedded_test_server()->RegisterRequestMonitor(base::Bind(
        &RequestMonitoringNavigationBrowserTest::MonitorRequestOnIoThread,
        weak_factory_.GetWeakPtr(), base::SequencedTaskRunnerHandle::Get()));

    ASSERT_TRUE(embedded_test_server()->Start());
  }

  void TearDown() override {
    EXPECT_TRUE(embedded_test_server()->ShutdownAndWaitUntilComplete());
  }

 private:
  static void MonitorRequestOnIoThread(
      const base::WeakPtr<RequestMonitoringNavigationBrowserTest>& weak_this,
      const scoped_refptr<base::SequencedTaskRunner>& postback_task_runner,
      const net::test_server::HttpRequest& request) {
    postback_task_runner->PostTask(
        FROM_HERE,
        base::BindOnce(
            &RequestMonitoringNavigationBrowserTest::MonitorRequestOnMainThread,
            weak_this, request));
  }

  void MonitorRequestOnMainThread(
      const net::test_server::HttpRequest& request) {
    accumulated_requests_.push_back(request);
  }

  std::vector<net::test_server::HttpRequest> accumulated_requests_;
  base::WeakPtrFactory<RequestMonitoringNavigationBrowserTest> weak_factory_;
};

// Helper for waiting until the main frame of |web_contents| has loaded
// |expected_url| (and all subresources have finished loading).
class WebContentsLoadFinishedWaiter : public WebContentsObserver {
 public:
  WebContentsLoadFinishedWaiter(WebContents* web_contents,
                                const GURL& expected_url)
      : WebContentsObserver(web_contents),
        expected_url_(expected_url),
        message_loop_runner_(new MessageLoopRunner) {
    EXPECT_TRUE(web_contents != nullptr);
  }

  void Wait() { message_loop_runner_->Run(); }

 private:
  void DidFinishLoad(RenderFrameHost* render_frame_host,
                     const GURL& url) override {
    bool is_main_frame = !render_frame_host->GetParent();
    if (url == expected_url_ && is_main_frame)
      message_loop_runner_->Quit();
  }

  GURL expected_url_;
  scoped_refptr<MessageLoopRunner> message_loop_runner_;
};

}  // namespace

// Check that NavigationController::LoadURLParams::extra_headers are not copied
// to subresource requests.
IN_PROC_BROWSER_TEST_F(RequestMonitoringNavigationBrowserTest,
                       ExtraHeadersVsSubresources) {
  GURL page_url = embedded_test_server()->GetURL("/page_with_image.html");
  GURL image_url = embedded_test_server()->GetURL("/blank.jpg");

  // Navigate via LoadURLWithParams (setting |extra_headers| field).
  WebContentsLoadFinishedWaiter waiter(shell()->web_contents(), page_url);
  NavigationController::LoadURLParams load_url_params(page_url);
  load_url_params.extra_headers =
      "X-ExtraHeadersVsSubresources: 1\n"
      "X-2ExtraHeadersVsSubresources: 2";
  shell()->web_contents()->GetController().LoadURLWithParams(load_url_params);
  waiter.Wait();
  EXPECT_EQ(page_url, shell()->web_contents()->GetLastCommittedURL());

  // Verify that the extra header was present for the page.
  const net::test_server::HttpRequest* page_request =
      FindAccumulatedRequest(page_url);
  ASSERT_TRUE(page_request);
  EXPECT_THAT(page_request->headers,
              testing::Contains(testing::Key("X-ExtraHeadersVsSubresources")));
  EXPECT_THAT(page_request->headers,
              testing::Contains(testing::Key("X-2ExtraHeadersVsSubresources")));

  // Verify that the extra header was NOT present for the subresource.
  const net::test_server::HttpRequest* image_request =
      FindAccumulatedRequest(image_url);
  ASSERT_TRUE(image_request);
  EXPECT_THAT(image_request->headers,
              testing::Not(testing::Contains(
                  testing::Key("X-ExtraHeadersVsSubresources"))));
  EXPECT_THAT(image_request->headers,
              testing::Not(testing::Contains(
                  testing::Key("X-2ExtraHeadersVsSubresources"))));
}

// Test that a same document navigation does not lead to the deletion of the
// NavigationHandle for an ongoing different document navigation.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       SameDocumentNavigationDoesntDeleteNavigationHandle) {
  const GURL kURL1 = embedded_test_server()->GetURL("/title1.html");
  const GURL kPushStateURL =
      embedded_test_server()->GetURL("/title1.html#fragment");
  const GURL kURL2 = embedded_test_server()->GetURL("/title2.html");

  // Navigate to the initial page.
  EXPECT_TRUE(NavigateToURL(shell(), kURL1));
  RenderFrameHostImpl* main_frame =
      static_cast<WebContentsImpl*>(shell()->web_contents())->GetMainFrame();
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  EXPECT_FALSE(main_frame->GetNavigationHandle());
  EXPECT_FALSE(root->navigation_request());

  // Start navigating to the second page.
  TestNavigationManager manager(shell()->web_contents(), kURL2);
  NavigationHandleCommitObserver navigation_observer(shell()->web_contents(),
                                                     kURL2);
  shell()->web_contents()->GetController().LoadURL(
      kURL2, Referrer(), ui::PAGE_TRANSITION_LINK, std::string());
  EXPECT_TRUE(manager.WaitForRequestStart());

  // This should create a NavigationHandle.
  NavigationRequest* request = root->navigation_request();
  EXPECT_TRUE(request);

  // The current page does a PushState.
  NavigationHandleCommitObserver push_state_observer(shell()->web_contents(),
                                                     kPushStateURL);
  std::string push_state =
      JsReplace("history.pushState({}, 'title 1', $1);", kPushStateURL);
  EXPECT_TRUE(ExecJs(shell()->web_contents(), push_state));
  NavigationEntry* last_committed =
      shell()->web_contents()->GetController().GetLastCommittedEntry();
  ASSERT_TRUE(last_committed);
  EXPECT_EQ(kPushStateURL, last_committed->GetURL());

  EXPECT_TRUE(push_state_observer.has_committed());
  EXPECT_TRUE(push_state_observer.was_same_document());
  EXPECT_TRUE(push_state_observer.was_renderer_initiated());

  // This shouldn't affect the ongoing navigation.
  EXPECT_TRUE(root->navigation_request());
  EXPECT_EQ(request, root->navigation_request());

  // Let the navigation finish. It should commit successfully.
  manager.WaitForNavigationFinished();
  last_committed =
      shell()->web_contents()->GetController().GetLastCommittedEntry();
  ASSERT_TRUE(last_committed);
  EXPECT_EQ(kURL2, last_committed->GetURL());

  EXPECT_TRUE(navigation_observer.has_committed());
  EXPECT_FALSE(navigation_observer.was_same_document());
  EXPECT_FALSE(navigation_observer.was_renderer_initiated());
}

// Tests that a same document browser-initiated navigation is properly reported
// by the NavigationHandle.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       SameDocumentBrowserInitiated) {
  const GURL kURL = embedded_test_server()->GetURL("/title1.html");
  const GURL kFragmentURL =
      embedded_test_server()->GetURL("/title1.html#fragment");

  // Navigate to the initial page.
  EXPECT_TRUE(NavigateToURL(shell(), kURL));

  // Do a browser-initiated fragment navigation.
  NavigationHandleCommitObserver handle_observer(shell()->web_contents(),
                                                 kFragmentURL);
  EXPECT_TRUE(NavigateToURL(shell(), kFragmentURL));

  EXPECT_TRUE(handle_observer.has_committed());
  EXPECT_TRUE(handle_observer.was_same_document());
  EXPECT_FALSE(handle_observer.was_renderer_initiated());
}

// Tests that a 204 response to a browser-initiated navigation does not result
// in a new NavigationEntry being committed.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       204Navigation) {
  const GURL kURL = embedded_test_server()->GetURL("/title1.html");
  const GURL kURL204 = embedded_test_server()->GetURL("/page204.html");

  // Navigate to the initial page.
  EXPECT_TRUE(NavigateToURL(shell(), kURL));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(kURL, entry->GetURL());
  EXPECT_EQ(1, controller.GetEntryCount());

  // Do a 204 navigation.
  EXPECT_FALSE(NavigateToURL(shell(), kURL204));

  entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(kURL, entry->GetURL());
  EXPECT_EQ(1, controller.GetEntryCount());
}

// Tests that stopping a load clears the pending navigation entry.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, StopDuringLoad) {
  // Load an initial page since the behavior differs for the first entry.
  GURL start_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), start_url));

  TestNavigationObserver same_tab_observer(shell()->web_contents(), 1);
  GURL slow_url = embedded_test_server()->GetURL("/slow?60");
  shell()->LoadURL(slow_url);
  shell()->web_contents()->Stop();

  NavigationController& controller = shell()->web_contents()->GetController();
  ASSERT_EQ(controller.GetPendingEntry(), nullptr);
}

// Tests that reloading a page that has no title doesn't inherit the title from
// the previous version of the page.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest, ReloadDoesntKeepTitle) {
  NavigationController& controller = shell()->web_contents()->GetController();
  GURL start_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  GURL intermediate_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_2.html"));
  base::string16 title = base::UTF8ToUTF16("title");

  // Reload from the browser side.
  {
    EXPECT_TRUE(NavigateToURL(shell(), start_url));

    NavigationEntry* entry = controller.GetLastCommittedEntry();
    EXPECT_TRUE(entry->GetTitle().empty());
    entry->SetTitle(title);

    controller.Reload(ReloadType::NORMAL, false);
    EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

    EXPECT_TRUE(entry->GetTitle().empty());
  }

  // Load an unrelated page; this disconnects these two tests.
  EXPECT_TRUE(NavigateToURL(shell(), intermediate_url));

  // Reload from the renderer side.
  {
    EXPECT_TRUE(NavigateToURL(shell(), start_url));

    NavigationEntry* entry = controller.GetLastCommittedEntry();
    EXPECT_TRUE(entry->GetTitle().empty());
    entry->SetTitle(title);

    TestNavigationObserver reload_observer(shell()->web_contents());
    EXPECT_TRUE(ExecuteScript(shell(), "location.reload()"));
    reload_observer.Wait();

    EXPECT_TRUE(entry->GetTitle().empty());
  }

  // Load an unrelated page; this disconnects these two tests.
  EXPECT_TRUE(NavigateToURL(shell(), intermediate_url));

  // "Reload" by loading the same page again.
  {
    EXPECT_TRUE(NavigateToURL(shell(), start_url));

    NavigationEntry* entry1 = controller.GetLastCommittedEntry();
    EXPECT_TRUE(entry1->GetTitle().empty());
    entry1->SetTitle(title);

    EXPECT_TRUE(NavigateToURL(shell(), start_url));
    NavigationEntry* entry2 = controller.GetLastCommittedEntry();

    EXPECT_EQ(entry1, entry2);
    EXPECT_TRUE(entry1->GetTitle().empty());
  }
}

// Verify that session history navigations (back/forward) correctly hit the
// cache instead of going to the server. The test loads a page with no-cache
// header, stops the server, and goes back expecting successful navigation.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       HistoryNavigationUsesCache) {
  GURL no_cache_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_no_cache_header.html"));
  GURL regular_url(embedded_test_server()->GetURL("/title2.html"));

  NavigationController& controller = shell()->web_contents()->GetController();

  EXPECT_TRUE(NavigateToURL(shell(), no_cache_url));
  EXPECT_TRUE(NavigateToURL(shell(), regular_url));
  EXPECT_EQ(2, controller.GetEntryCount());

  EXPECT_TRUE(embedded_test_server()->ShutdownAndWaitUntilComplete());

  TestNavigationObserver back_observer(shell()->web_contents());
  controller.GoBack();
  back_observer.Wait();

  EXPECT_TRUE(back_observer.last_navigation_succeeded());
}

// Test to verify that navigating to a blocked URL does not result in a
// NavigationEntry that allows the navigation to succeed when using a history
// navigation. See https://crbug.com/723796.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       VerifyBlockedErrorPageURL_SessionHistory) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  GURL start_url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), start_url));
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());

  // Navigate to an URL, which redirects to a data: URL, since it is an
  // unsafe redirect and will result in a blocked navigation and error page.
  // TODO(nasko): Find a different way to cause a blocked navigation, so
  // we test a bit more generic case.
  GURL redirect_to_unsafe_url(
      embedded_test_server()->GetURL("/server-redirect?data:text/html,Hello!"));
  EXPECT_FALSE(NavigateToURL(shell(), redirect_to_unsafe_url));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(PAGE_TYPE_ERROR, controller.GetLastCommittedEntry()->GetPageType());

  // Navigate to a new document, then go back in history trying to load the
  // blocked URL.
  EXPECT_TRUE(
      NavigateToURL(shell(), embedded_test_server()->GetURL("/title1.html")));
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());

  TestNavigationObserver back_load_observer(shell()->web_contents());
  controller.GoBack();
  back_load_observer.Wait();

  // The expectation is that the blocked URL is present in the NavigationEntry,
  // and shows up in both GetURL and GetVirtualURL.
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->GetURL().SchemeIs(url::kDataScheme));
  EXPECT_EQ(redirect_to_unsafe_url,
            controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(redirect_to_unsafe_url,
            controller.GetLastCommittedEntry()->GetVirtualURL());
}

// Verifies that redirecting to a blocked URL and going back does not allow a
// URL spoof.  See https://crbug.com/777419.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       PreventSpoofFromBlockedRedirect) {
  GURL url1 = embedded_test_server()->GetURL(
      "a.com", "/navigation_controller/simple_page_1.html");
  EXPECT_TRUE(NavigateToURL(shell(), url1));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // Pop open a new window.
  ShellAddedObserver new_shell_observer;
  EXPECT_TRUE(ExecuteScript(root, "var w = window.open()"));
  Shell* new_shell = new_shell_observer.GetShell();
  ASSERT_NE(new_shell->web_contents(), shell()->web_contents());
  EXPECT_FALSE(
      new_shell->web_contents()->GetController().GetLastCommittedEntry());

  // Navigate it to a cross-site URL that redirects to a data: URL.  Since it is
  // an unsafe redirect, it will result in a blocked navigation and error page.
  GURL redirect_to_data_url(
      embedded_test_server()->GetURL("/server-redirect?data:text/html,Hello!"));
  TestNavigationObserver nav_observer(new_shell->web_contents(), 1);
  EXPECT_TRUE(ExecuteScript(
      root, "w.location.href = '" + redirect_to_data_url.spec() + "';"));
  nav_observer.WaitForNavigationFinished();
  EXPECT_FALSE(nav_observer.last_navigation_succeeded());
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      new_shell->web_contents()->GetController());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(redirect_to_data_url, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(PAGE_TYPE_ERROR, controller.GetLastCommittedEntry()->GetPageType());

  // Navigate to a new document, then go back in history trying to load the
  // blocked URL.
  EXPECT_TRUE(NavigateToURL(new_shell, url1));
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url1, controller.GetLastCommittedEntry()->GetURL());
  TestNavigationObserver back_load_observer(new_shell->web_contents());
  controller.GoBack();
  back_load_observer.Wait();
  EXPECT_EQ(redirect_to_data_url, controller.GetLastCommittedEntry()->GetURL());

  // The opener should not be able to script the page, which should be another
  // error message and not a blank page.
  std::string result = EvalJs(shell(),
                              "try {\n"
                              "  w.document.body.innerHTML;\n"
                              "} catch (e) {\n"
                              "  e.toString();\n"
                              "}")
                           .ExtractString();
  DLOG(INFO) << "Result: " << result;
  EXPECT_THAT(result,
              ::testing::MatchesRegex("SecurityError: Blocked a frame with "
                                      "origin \"http://a.com:\\d+\" from "
                                      "accessing a cross-origin frame."));
}

// Same-document navigations can sometimes succeed but then later be blocked by
// policy (e.g., X-Frame-Options) after a page is restored or reloaded.  Ensure
// that navigating back from a newly blocked URL in a subframe is not treated as
// same-document, even if it had been same-document originally.
// See https://crbug.com/765291.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       BackSameDocumentAfterBlockedSubframe) {
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  GURL start_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe_simple.html"));
  EXPECT_TRUE(NavigateToURL(shell(), start_url));

  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  // pushState to a URL that will be blocked by XFO if loaded from scratch.
  {
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    std::string pushStateToXfo =
        "history.pushState({}, '', '/x-frame-options-deny.html')";
    EXPECT_TRUE(ExecuteScript(root->child_at(0), pushStateToXfo));
    capturer.Wait();
    EXPECT_TRUE(capturer.is_same_document());
  }

  // Navigate the main frame to another page.
  GURL new_url(embedded_test_server()->GetURL(
      "/navigation_controller/simple_page_1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), new_url));

  // Go back, causing the subframe to be blocked by XFO.
  {
    TestNavigationObserver observer(shell()->web_contents());
    controller.GoBack();
    observer.Wait();
    GURL x_frame_options_deny_url =
        embedded_test_server()->GetURL("/x-frame-options-deny.html");
    EXPECT_EQ(x_frame_options_deny_url, root->child_at(0)->current_url());
    EXPECT_EQ(net::ERR_BLOCKED_BY_RESPONSE, observer.last_net_error_code());
    EXPECT_FALSE(observer.last_navigation_succeeded());
  }

  // Go back again.  This would have been same-document if the prior navigation
  // had succeeded.
  {
    TestNavigationObserver observer(shell()->web_contents());
    controller.GoBack();
    observer.Wait();
  }

  // Check that the renderer is still alive.
  EXPECT_TRUE(ExecuteScript(root->child_at(0), "console.log('Success');"));
}

// If the main frame does a load, it should not be reported as a subframe
// navigation. This used to occur in the following case:
// 1. You're on a site with frames.
// 2. You do a subframe navigation. This was stored with transition type
//    MANUAL_SUBFRAME.
// 3. You navigate to some non-frame site.
// 4. You navigate back to the page from step 2. Since it was initially
//    MANUAL_SUBFRAME, it will be that same transition type here.
// We don't want that, because any navigation that changes the toplevel frame
// should be tracked as a toplevel navigation (this allows us to update the URL
// bar, etc).
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       GoBackToManualSubFrame) {
  GURL main_url(embedded_test_server()->GetURL(
      "/navigation_controller/page_with_iframe.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));

  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  ASSERT_EQ(1U, root->child_count());
  ASSERT_NE(nullptr, root->child_at(0));

  {
    // Iframe initial load.
    LoadCommittedCapturer capturer(root->child_at(0));
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_1.html"));
    NavigateFrameToURL(root->child_at(0), frame_url);
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition_type(), ui::PAGE_TRANSITION_AUTO_SUBFRAME));
  }

  {
    // Iframe manual navigation.
    FrameNavigateParamsCapturer capturer(root->child_at(0));
    GURL frame_url(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_2.html"));
    NavigateFrameToURL(root->child_at(0), frame_url);
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
    EXPECT_EQ(NAVIGATION_TYPE_NEW_SUBFRAME, capturer.navigation_type());
  }

  {
    // Main frame navigation.
    FrameNavigateParamsCapturer capturer(root);
    GURL main_url_2(embedded_test_server()->GetURL(
        "/navigation_controller/simple_page_2.html"));
    NavigateFrameToURL(root, main_url_2);
    capturer.Wait();
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(), ui::PAGE_TRANSITION_LINK));
  }

  {
    // Check the history before going back.
    NavigationControllerImpl& controller =
        static_cast<NavigationControllerImpl&>(
            shell()->web_contents()->GetController());
    EXPECT_EQ(3, controller.GetEntryCount());
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        controller.GetEntryAtIndex(0)->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    // TODO(creis, arthursonzogni): The correct PageTransition is still an open
    // question. Maybe PAGE_TRANSITION_MANUAL_SUBFRAME is more appropriate.
    // Please see https://crbug.com/740461.
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        controller.GetEntryAtIndex(1)->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        controller.GetEntryAtIndex(2)->GetTransitionType(),
        ui::PAGE_TRANSITION_LINK));
  }

  {
    // Back.
    FrameNavigateParamsCapturer capturer(root);
    shell()->web_contents()->GetController().GoBack();
    capturer.Wait();
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        capturer.transition(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FORWARD_BACK |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
  }

  {
    // Check the history again.
    NavigationControllerImpl& controller =
        static_cast<NavigationControllerImpl&>(
            shell()->web_contents()->GetController());
    EXPECT_EQ(3, controller.GetEntryCount());
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        controller.GetEntryAtIndex(0)->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        controller.GetEntryAtIndex(1)->GetTransitionType(),
        ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                  ui::PAGE_TRANSITION_FORWARD_BACK |
                                  ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)));
    EXPECT_TRUE(ui::PageTransitionTypeIncludingQualifiersIs(
        controller.GetEntryAtIndex(2)->GetTransitionType(),
        ui::PAGE_TRANSITION_LINK));
  }
}

// Regression test for https://crbug.com/845923.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       GoBackFromCrossSiteSubFrame) {
  // Navigate to a page with a cross-site frame.
  GURL main_url(embedded_test_server()->GetURL(
      "a.com", "/cross_site_iframe_factory.html?a(b)"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  GURL initial_subframe_url =
      root->child_at(0)->current_frame_host()->GetLastCommittedURL();
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetCurrentEntryIndex());

  // Navigate the subframe to another cross-site location
  // (this prepares for executing history.back() in a later step).
  GURL final_subframe_url =
      embedded_test_server()->GetURL("b.com", "/title1.html");
  NavigateFrameToURL(root->child_at(0), final_subframe_url);
  EXPECT_EQ(final_subframe_url,
            root->child_at(0)->current_frame_host()->GetLastCommittedURL());
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetCurrentEntryIndex());

  // Execute |history.back()| in the subframe.
  TestNavigationObserver nav_observer(shell()->web_contents(), 1);
  EXPECT_TRUE(ExecuteScript(root->child_at(0), "history.back()"));
  nav_observer.Wait();
  EXPECT_EQ(initial_subframe_url,
            root->child_at(0)->current_frame_host()->GetLastCommittedURL());
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetCurrentEntryIndex());
}

IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       HashNavigationVsBeforeUnloadEvent) {
  GURL main_url(embedded_test_server()->GetURL("/title1.html"));
  GURL hash_url(embedded_test_server()->GetURL("/title1.html#hash"));

  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  EXPECT_TRUE(
      ExecuteScript(shell(),
                    R"( window.addEventListener("beforeunload", function(e) {
              domAutomationController.send("beforeunload");
          });
          window.addEventListener("unload", function(e) {
              domAutomationController.send("unload");
          });
      )"));

  DOMMessageQueue message_queue;
  std::vector<std::string> messages;
  std::string message;
  EXPECT_TRUE(NavigateToURL(shell(), hash_url));
  while (message_queue.PopMessage(&message))
    messages.push_back(message);

  // Verify that none of "beforeunload", "unload" events fired.
  EXPECT_THAT(messages, testing::IsEmpty());
}

// This test helps verify that the browser does not retain history entries
// for removed frames *if* the removed frame was created by a script.
// Such frames get a fresh, random, unique name every time they are created
// or recreated and therefore in such case will never match previous history
// entries.  See also https://crbug.com/784356.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       PruningOfEntriesForDynamicFrames_ChildRemoved) {
  GURL main_url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));

  // Repeatedly create and remove a frame from a script.
  std::string script = R"(
        (async () => {
           for (let i = 0; i < 5; i++) {
             // Create and remove an iframe.
             let iframe = document.createElement('iframe');
             document.body.appendChild(iframe);
             document.body.removeChild(iframe);
             // Let the message loop run (this works in an async function).
             await new Promise(resolve => setTimeout(resolve, 0));
           }
           return 'done-with-test';
        })(); )";
  EXPECT_EQ("done-with-test", EvalJs(shell(), script));

  // Grab the last committed entry.
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(1, controller.GetEntryCount());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(main_url, entry->GetURL());

  // Verify that the number of FrameNavigationEntries stayed low (i.e. that we
  // do not retain history entries for the 5 frames removed by the test).
  EXPECT_EQ(0U, entry->root_node()->children.size());

  // Sanity check - there are no children in the frame tree.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  ASSERT_EQ(0U, root->child_count());
}

// This test helps verify that the browser does not retain history entries
// for removed frames *if* the removed frame was created by a script.
// Such frames get a fresh, random, unique name every time they are created
// or recreated and therefore in such case will never match previous history
// entries.  See also https://crbug.com/784356.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       PruningOfEntriesForDynamicFrames_ParentNavigatedAway) {
  GURL main_url(embedded_test_server()->GetURL(
      "a.com", "/navigation_controller/page_with_iframe_simple.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // Add 5 dynamic subframes to |frame|.
  RenderFrameHost* frame = shell()->web_contents()->GetAllFrames()[1];
  std::string script = R"(
        for (var i = 0; i < 5; i++) {
          var iframe = document.createElement("iframe");
          document.body.appendChild(iframe);
        }; )";
  EXPECT_TRUE(ExecuteScript(frame, script));

  // Verify that now there are 5 FNEs for the dynamic frames.
  EXPECT_EQ(1, controller.GetEntryCount());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(main_url, entry->GetURL());
  EXPECT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(5U, entry->root_node()->children[0]->children.size());

  // Navigate |frame| (the parent of the dynamic frames) away.
  // This will destroy the 5 dynamic children of |frame|.
  GURL next_url(embedded_test_server()->GetURL("b.com", "/title2.html"));
  EXPECT_TRUE(NavigateIframeToURL(shell()->web_contents(), "frame", next_url));

  // Verify that there are now 0 FNEs for the dynamic frames.
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(main_url, entry->GetURL());
  EXPECT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(0U, entry->root_node()->children[0]->children.size());
}

// This test helps verify that the browser does not retain history entries
// for removed frames *if* the removed frame was created by a script.
// Such frames get a fresh, random, unique name every time they are created
// or recreated and therefore in such case will never match previous history
// entries.  See also https://crbug.com/784356.
IN_PROC_BROWSER_TEST_F(
    NavigationControllerBrowserTest,
    PruningOfEntriesForDynamicFrames_MainFrameNavigatedAway) {
  GURL main_url(embedded_test_server()->GetURL(
      "a.com", "/navigation_controller/page_with_iframe_simple.html"));
  EXPECT_TRUE(NavigateToURL(shell(), main_url));
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());

  // Add 5 dynamic subframes to |frame|.
  RenderFrameHost* frame = shell()->web_contents()->GetAllFrames()[1];
  std::string script = R"(
        for (var i = 0; i < 5; i++) {
          var iframe = document.createElement("iframe");
          document.body.appendChild(iframe);
        }; )";
  EXPECT_TRUE(ExecuteScript(frame, script));

  // Verify that now there are 5 FNEs for the dynamic frames.
  EXPECT_EQ(1, controller.GetEntryCount());
  NavigationEntryImpl* entry = controller.GetLastCommittedEntry();
  EXPECT_EQ(main_url, entry->GetURL());
  EXPECT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(5U, entry->root_node()->children[0]->children.size());

  // Navigate the main frame (the grandparent of the dynamic frames) away.
  // This will destroy the 5 dynamic children of |frame|.
  GURL next_url(embedded_test_server()->GetURL("b.com", "/title2.html"));
  EXPECT_TRUE(NavigateToURL(shell(), next_url));

  // Verify that there are now 0 FNEs for the dynamic frames.
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(main_url, entry->GetURL());
  EXPECT_EQ(1U, entry->root_node()->children.size());
  EXPECT_EQ(0U, entry->root_node()->children[0]->children.size());
}

// This test supplements SpareRenderProcessHostUnitTest to verify that the spare
// RenderProcessHost is actually used in cross-process navigations.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       UtilizationOfSpareRenderProcessHost) {
  GURL first_url = embedded_test_server()->GetURL("a.com", "/title1.html");
  GURL second_url = embedded_test_server()->GetURL("b.com", "/title2.html");
  RenderProcessHost* prev_spare = nullptr;
  RenderProcessHost* curr_spare = nullptr;
  RenderProcessHost* prev_host = nullptr;
  RenderProcessHost* curr_host = nullptr;

  // In the current implementation the spare is not warmed-up until the first
  // real navigation.  It might be okay to change that in the future.
  curr_spare = RenderProcessHostImpl::GetSpareRenderProcessHostForTesting();
  curr_host = shell()->web_contents()->GetMainFrame()->GetProcess();
  EXPECT_FALSE(curr_spare);

  // Navigate to the first URL.
  prev_host = curr_host;
  prev_spare = curr_spare;
  EXPECT_TRUE(NavigateToURL(shell(), first_url));
  curr_spare = RenderProcessHostImpl::GetSpareRenderProcessHostForTesting();
  curr_host = shell()->web_contents()->GetMainFrame()->GetProcess();
  EXPECT_NE(curr_spare, curr_host);
  // No process swap when navigating away from the initial blank page.
  EXPECT_EQ(prev_host, curr_host);
  // We should always keep a spare RenderProcessHost around in site-per-process
  // mode.  We don't assert what should happen in other scenarios (to give
  // flexibility to platform-specific decisions - e.g. on the desktop there
  // might be no spare outside of site-per-process, but on Android the spare
  // might still be opportunistically warmed up).
  if (AreAllSitesIsolatedForTesting())
    EXPECT_TRUE(curr_spare);

  // Perform a cross-site omnibox navigation.
  prev_host = curr_host;
  prev_spare = curr_spare;
  RenderProcessHostWatcher prev_host_watcher(
      prev_host, RenderProcessHostWatcher::WATCH_FOR_HOST_DESTRUCTION);
  EXPECT_TRUE(NavigateToURL(shell(), second_url));
  // Wait until the |prev_host| goes away - this ensures that the spare will be
  // picked up by subsequent back navigation below.
  prev_host_watcher.Wait();
  curr_spare = RenderProcessHostImpl::GetSpareRenderProcessHostForTesting();
  curr_host = shell()->web_contents()->GetMainFrame()->GetProcess();
  // The cross-site omnibox navigation should swap processes.
  EXPECT_NE(prev_host, curr_host);
  // If present, the spare RenderProcessHost should have been be used.
  if (prev_spare)
    EXPECT_EQ(prev_spare, curr_host);
  // A new spare should be warmed-up in site-per-process mode.
  if (AreAllSitesIsolatedForTesting()) {
    EXPECT_TRUE(curr_spare);
    EXPECT_NE(prev_spare, curr_spare);
  }

  // Perform a back navigation.
  prev_host = curr_host;
  prev_spare = curr_spare;
  TestNavigationObserver back_load_observer(shell()->web_contents());
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  controller.GoBack();
  back_load_observer.Wait();
  curr_spare = RenderProcessHostImpl::GetSpareRenderProcessHostForTesting();
  curr_host = shell()->web_contents()->GetMainFrame()->GetProcess();
  // The cross-site back navigation should swap processes.
  EXPECT_NE(prev_host, curr_host);
  // If present, the spare RenderProcessHost should have been used.
  if (prev_spare)
    EXPECT_EQ(prev_spare, curr_host);
  // A new spare should be warmed-up in site-per-process mode.
  if (AreAllSitesIsolatedForTesting()) {
    EXPECT_TRUE(curr_spare);
    EXPECT_NE(prev_spare, curr_spare);
  }
}

class NavigationControllerControllableResponseBrowserTest
    : public ContentBrowserTest {
 protected:
  void SetUpOnMainThread() override {
    host_resolver()->AddRule("*", "127.0.0.1");
    content::SetupCrossSiteRedirector(embedded_test_server());
  }
};

// Data URLs can have a reference fragment like any other URLs. In this test,
// there are two navigations with the same data URL, but with a different
// reference. The second navigation must be classified as "same-document".
IN_PROC_BROWSER_TEST_F(ContentBrowserTest, DataURLSameDocumentNavigation) {
  GURL url_first("data:text/html,body#foo");
  GURL url_second("data:text/html,body#bar");
  EXPECT_TRUE(url_first.EqualsIgnoringRef(url_second));

  EXPECT_TRUE(NavigateToURL(shell(), url_first));

  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  FrameNavigateParamsCapturer capturer(root);
  shell()->LoadURL(url_second);
  capturer.Wait();
  EXPECT_TRUE(capturer.is_same_document());
}

// Verify that a session history navigation which results in a different
// SiteInstance from the original commit is correctly handled - classified
// as new navigation with replacement, resulting in no new navigation
// entries.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       SiteInstanceChangeOnHistoryNavigation) {
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();
  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  GURL url1(embedded_test_server()->GetURL("a.com", "/title1.html"));
  GURL url2(embedded_test_server()->GetURL("b.com", "/title2.html"));
  GURL url3(embedded_test_server()->GetURL("c.com", "/title3.html"));
  GURL redirecting_url(embedded_test_server()->GetURL(
      "a.com", "/server-redirect?" + url3.spec()));

  // Start with an initial URL.
  EXPECT_TRUE(NavigateToURL(shell(), url1));
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url1, controller.GetEntryAtIndex(0)->GetURL());
  scoped_refptr<SiteInstance> initial_site_instance =
      root->current_frame_host()->GetSiteInstance();

  {
    // history.replaceState(), pointing to a URL that would redirect to |url3|.
    FrameNavigateParamsCapturer capturer(root);
    std::string script =
        "history.replaceState({}, '', '" + redirecting_url.spec() + "')";
    EXPECT_TRUE(ExecuteScript(root, script));
    capturer.Wait();
  }
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(redirecting_url, controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(initial_site_instance,
            root->current_frame_host()->GetSiteInstance());

  // Navigate to a new URL to get new session history entry.
  EXPECT_TRUE(NavigateToURL(shell(), url2));
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_NE(initial_site_instance,
            root->current_frame_host()->GetSiteInstance());

  // Back, which should redirect to |url3|.
  FrameNavigateParamsCapturer capturer(root);
  shell()->web_contents()->GetController().GoBack();
  capturer.Wait();
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());

  NavigationEntry* entry = controller.GetEntryAtIndex(0);
  EXPECT_EQ(entry, controller.GetLastCommittedEntry());
  EXPECT_EQ(url3, entry->GetURL());
  if (AreAllSitesIsolatedForTesting()) {
    EXPECT_NE(initial_site_instance,
              root->current_frame_host()->GetSiteInstance());
    EXPECT_EQ(SiteInstance::GetSiteForURL(
                  shell()->web_contents()->GetBrowserContext(), url3),
              root->current_frame_host()->GetSiteInstance()->GetSiteURL());
    EXPECT_EQ(NAVIGATION_TYPE_NEW_PAGE, capturer.navigation_type());
  } else {
    EXPECT_EQ(initial_site_instance,
              root->current_frame_host()->GetSiteInstance());
    EXPECT_EQ(NAVIGATION_TYPE_EXISTING_PAGE, capturer.navigation_type());
  }
}

// history.back() called twice in the renderer process should not make the user
// navigate back twice.
// Regression test for https://crbug.com/869710
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       HistoryBackTwiceFromRendererWithoutUserGesture) {
  GURL url1(embedded_test_server()->GetURL("a.com", "/title1.html"));
  GURL url2(embedded_test_server()->GetURL("b.com", "/title2.html"));
  GURL url3(embedded_test_server()->GetURL("c.com", "/title3.html"));

  EXPECT_TRUE(NavigateToURL(shell(), url1));
  EXPECT_TRUE(NavigateToURL(shell(), url2));
  EXPECT_TRUE(NavigateToURL(shell(), url3));

  EXPECT_TRUE(ExecuteScriptWithoutUserGesture(
      shell(), "history.back(); history.back();"));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  EXPECT_EQ(url2, shell()->web_contents()->GetLastCommittedURL());
}

// history.back() called twice in the renderer process should not make the user
// navigate back twice. Even with a user gesture.
// Regression test for https://crbug.com/869710
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       HistoryBackTwiceFromRendererWithUserGesture) {
  GURL url1(embedded_test_server()->GetURL("a.com", "/title1.html"));
  GURL url2(embedded_test_server()->GetURL("b.com", "/title2.html"));
  GURL url3(embedded_test_server()->GetURL("c.com", "/title3.html"));

  EXPECT_TRUE(NavigateToURL(shell(), url1));
  EXPECT_TRUE(NavigateToURL(shell(), url2));
  EXPECT_TRUE(NavigateToURL(shell(), url3));

  EXPECT_TRUE(ExecuteScript(shell(), "history.back(); history.back();"));
  EXPECT_TRUE(WaitForLoadStop(shell()->web_contents()));

  // TODO(https://crbug.com/869710): This should be url2.
  EXPECT_EQ(url1, shell()->web_contents()->GetLastCommittedURL());
}

class NavigationControllerHistoryInterventionBrowserTest
    : public NavigationControllerBrowserTest {
 protected:
  void SetUp() override {
    feature_list_.InitAndEnableFeature(
        features::kHistoryManipulationIntervention);
    NavigationControllerBrowserTest::SetUp();
  }

 private:
  base::test::ScopedFeatureList feature_list_;
};

// Tests that the navigation entry is marked as skippable on back/forward button
// if it does a renderer initiated navigation without ever getting a user
// activation.
IN_PROC_BROWSER_TEST_F(NavigationControllerHistoryInterventionBrowserTest,
                       NoUserActivationSetSkipOnBackForward) {
  base::HistogramTester histograms;

  GURL non_skippable_url(
      embedded_test_server()->GetURL("/frame_tree/top.html"));
  EXPECT_TRUE(NavigateToURL(shell(), non_skippable_url));

  GURL skippable_url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), skippable_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_FALSE(root->HasBeenActivated());
  EXPECT_FALSE(root->HasTransientUserActivation());

  // Navigate to a new same-site document from the renderer without a user
  // gesture.
  GURL redirected_url(embedded_test_server()->GetURL("/title2.html"));
  EXPECT_TRUE(
      NavigateToURLFromRendererWithoutUserGesture(shell(), redirected_url));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(controller.GetCurrentEntryIndex(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);

  // Last entry should have been marked as skippable.
  EXPECT_TRUE(controller.GetEntryAtIndex(1)->should_skip_on_back_forward_ui());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->should_skip_on_back_forward_ui());
  histograms.ExpectBucketCount(
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI", true, 1);

  EXPECT_TRUE(controller.CanGoBack());
  // Attempt to go back or forward to the skippable entry should log the
  // corresponding histogram and skip the corresponding entry.
  TestNavigationObserver back_load_observer(shell()->web_contents());
  controller.GoBack();
  back_load_observer.Wait();
  histograms.ExpectBucketCount("Navigation.BackForward.BackTargetSkipped", 1,
                               1);
  histograms.ExpectBucketCount("Navigation.BackForward.AllBackTargetsSkippable",
                               false, 1);
  EXPECT_EQ(non_skippable_url, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
}

// Same as the above test except the navigation is cross-site in this case.
// Tests that the navigation entry is marked as skippable on back/forward button
// if it does a renderer initiated cross-site navigation without ever getting a
// user activation.
IN_PROC_BROWSER_TEST_F(NavigationControllerHistoryInterventionBrowserTest,
                       NoUserActivationSetSkipOnBackForwardCrossSite) {
  base::HistogramTester histograms;

  GURL non_skippable_url(
      embedded_test_server()->GetURL("/frame_tree/top.html"));
  EXPECT_TRUE(NavigateToURL(shell(), non_skippable_url));

  GURL skippable_url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), skippable_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_FALSE(root->HasBeenActivated());
  EXPECT_FALSE(root->HasTransientUserActivation());

  // Navigate to a new cross-site document from the renderer with a user
  // gesture.
  GURL redirected_url(
      embedded_test_server()->GetURL("foo.com", "/title1.html"));
  EXPECT_TRUE(
      NavigateToURLFromRendererWithoutUserGesture(shell(), redirected_url));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(controller.GetCurrentEntryIndex(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);

  // Last entry should have been marked as skippable.
  EXPECT_TRUE(controller.GetEntryAtIndex(1)->should_skip_on_back_forward_ui());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->should_skip_on_back_forward_ui());
  histograms.ExpectBucketCount(
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI", true, 1);

  EXPECT_TRUE(controller.CanGoBack());
  // Attempt to go back or forward to the skippable entry should log the
  // corresponding histogram and skip the corresponding entry.
  TestNavigationObserver back_load_observer(shell()->web_contents());
  controller.GoBack();
  back_load_observer.Wait();
  histograms.ExpectBucketCount("Navigation.BackForward.BackTargetSkipped", 1,
                               1);
  histograms.ExpectBucketCount("Navigation.BackForward.AllBackTargetsSkippable",
                               false, 1);
  EXPECT_EQ(non_skippable_url, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
}

// Tests that the navigation entry is marked as skippable on back/forward button
// but is not skipped if the feature is not enabled.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       NoSkipOnBackFeatureDisabled) {
  base::HistogramTester histograms;

  GURL non_skippable_url(
      embedded_test_server()->GetURL("/frame_tree/top.html"));
  EXPECT_TRUE(NavigateToURL(shell(), non_skippable_url));

  GURL skippable_url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), skippable_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_FALSE(root->HasBeenActivated());
  EXPECT_FALSE(root->HasTransientUserActivation());

  // Navigate to a new same-site document from the renderer without a user
  // gesture.
  GURL redirected_url(embedded_test_server()->GetURL("/title2.html"));
  EXPECT_TRUE(
      NavigateToURLFromRendererWithoutUserGesture(shell(), redirected_url));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(controller.GetCurrentEntryIndex(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);

  // Last entry should have been marked as skippable.
  EXPECT_TRUE(controller.GetEntryAtIndex(1)->should_skip_on_back_forward_ui());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->should_skip_on_back_forward_ui());
  histograms.ExpectBucketCount(
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI", true, 1);

  EXPECT_TRUE(controller.CanGoBack());
  // Attempt to go back or forward to the skippable entry should log the
  // corresponding histogram.
  TestNavigationObserver back_load_observer(shell()->web_contents());
  controller.GoBack();
  back_load_observer.Wait();
  histograms.ExpectBucketCount("Navigation.BackForward.BackTargetSkipped", 1,
                               1);
  // Since the feature is disabled, it will be navigated to the skippable entry.
  EXPECT_EQ(skippable_url, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
}

// Tests that the navigation entry is marked as skippable on back button if it
// does a renderer initiated navigation without ever getting a user activation.
// Also tests this for an entry added using history.pushState.
IN_PROC_BROWSER_TEST_F(NavigationControllerHistoryInterventionBrowserTest,
                       NoUserActivationSetSkippableMultipleGoBack) {
  base::HistogramTester histograms;
  const std::string histogram_name =
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI";

  GURL skippable_url(embedded_test_server()->GetURL("/frame_tree/top.html"));
  EXPECT_TRUE(NavigateToURL(shell(), skippable_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_FALSE(root->HasBeenActivated());
  EXPECT_FALSE(root->HasTransientUserActivation());

  // Navigate to a new same-site document from the renderer without a user
  // gesture.
  GURL redirected_url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(
      NavigateToURLFromRendererWithoutUserGesture(shell(), redirected_url));

  // Use the pushState API to add another entry without user gesture.
  GURL push_state_url(embedded_test_server()->GetURL("/title2.html"));
  std::string script("history.pushState('', '','" + push_state_url.spec() +
                     "');");
  EXPECT_TRUE(content::ExecuteScriptWithoutUserGesture(shell()->web_contents(),
                                                       script));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(controller.GetCurrentEntryIndex(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);

  // Last 2 entries should have been marked as skippable.
  EXPECT_TRUE(controller.GetEntryAtIndex(0)->should_skip_on_back_forward_ui());
  EXPECT_TRUE(controller.GetEntryAtIndex(1)->should_skip_on_back_forward_ui());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->should_skip_on_back_forward_ui());
  histograms.ExpectBucketCount(histogram_name, true, 2);

  // CanGoBack should return false since all previous entries are skippable.
  EXPECT_FALSE(controller.CanGoBack());

  // Attempt to go back to the entries marked to be skipped should log a
  // histogram.
  controller.GoBack();  // Will not go back
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);

  histograms.ExpectBucketCount("Navigation.BackForward.BackTargetSkipped", 2,
                               1);
  histograms.ExpectBucketCount("Navigation.BackForward.AllBackTargetsSkippable",
                               true, 1);
}

// Same as above but tests the metrics on going forward.
IN_PROC_BROWSER_TEST_F(NavigationControllerHistoryInterventionBrowserTest,
                       NoUserActivationSetSkippableMultipleGoForward) {
  base::HistogramTester histograms;
  const std::string histogram_name =
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI";

  GURL skippable_url(embedded_test_server()->GetURL("/frame_tree/top.html"));
  EXPECT_TRUE(NavigateToURL(shell(), skippable_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_FALSE(root->HasBeenActivated());
  EXPECT_FALSE(root->HasTransientUserActivation());

  // Navigate to a new same-site document from the renderer without a user
  // gesture.
  GURL redirected_url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(
      NavigateToURLFromRendererWithoutUserGesture(shell(), redirected_url));

  // Use the pushState API to add another entry without user gesture.
  GURL push_state_url(embedded_test_server()->GetURL("/title2.html"));
  std::string script("history.pushState('', '','" + push_state_url.spec() +
                     "');");
  EXPECT_TRUE(content::ExecuteScriptWithoutUserGesture(shell()->web_contents(),
                                                       script));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(controller.GetCurrentEntryIndex(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);

  // Last 2 entries should have been marked as skippable.
  EXPECT_TRUE(controller.GetEntryAtIndex(0)->should_skip_on_back_forward_ui());
  EXPECT_TRUE(controller.GetEntryAtIndex(1)->should_skip_on_back_forward_ui());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->should_skip_on_back_forward_ui());
  histograms.ExpectBucketCount(histogram_name, true, 2);

  // Go to the 1st entry.
  TestNavigationObserver load_observer(shell()->web_contents());
  controller.GoToIndex(0);
  load_observer.Wait();

  // Attempt to go forward to the entries marked to be skipped should log a
  // histogram.
  EXPECT_TRUE(controller.CanGoForward());
  TestNavigationObserver back_load_observer(shell()->web_contents());
  controller.GoForward();
  back_load_observer.Wait();
  histograms.ExpectBucketCount("Navigation.BackForward.ForwardTargetSkipped", 1,
                               1);
}

// Tests that if an entry is marked as skippable, it will be reset if there is a
// navigation to this entry again.
IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
                       ResetSkipOnBackForward) {
  base::HistogramTester histograms;
  GURL main_url(embedded_test_server()->GetURL("/frame_tree/top.html"));

  EXPECT_TRUE(NavigateToURL(shell(), main_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_FALSE(root->HasBeenActivated());
  EXPECT_FALSE(root->HasTransientUserActivation());

  // Navigate to a new same-site document from the renderer without a user
  // gesture.
  GURL url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(NavigateToURLFromRendererWithoutUserGesture(shell(), url));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(controller.GetCurrentEntryIndex(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);

  // Last entry should have been marked as skippable.
  EXPECT_TRUE(controller.GetEntryAtIndex(0)->should_skip_on_back_forward_ui());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->should_skip_on_back_forward_ui());
  histograms.ExpectBucketCount(
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI", true, 1);

  // Go back to the last entry.
  TestNavigationObserver back_nav_load_observer(shell()->web_contents());
  controller.GoToIndex(0);
  back_nav_load_observer.Wait();

  // Going back again to an entry should reset its skippable flag.
  EXPECT_FALSE(controller.GetEntryAtIndex(0)->should_skip_on_back_forward_ui());

  // Navigating away from this with a browser initiated navigation should log a
  // histogram with skippable as false.
  GURL url1(embedded_test_server()->GetURL("/title2.html"));
  EXPECT_TRUE(NavigateToURL(shell(), url1));
  histograms.ExpectBucketCount(
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI", false, 1);
}

// Tests that the navigation entry is not marked as skippable on back/forward
// button if it does a renderer initiated navigation after getting a user
// activation.
IN_PROC_BROWSER_TEST_F(NavigationControllerHistoryInterventionBrowserTest,
                       UserActivationDoNotSkipOnBackForward) {
  base::HistogramTester histograms;
  const std::string histogram_name =
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI";

  GURL non_skippable_url(
      embedded_test_server()->GetURL("/frame_tree/top.html"));
  EXPECT_TRUE(NavigateToURL(shell(), non_skippable_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_FALSE(root->HasBeenActivated());
  EXPECT_FALSE(root->HasTransientUserActivation());

  // Navigate to a new same-site document from the renderer.
  // Note that NavigateToURLFromRenderer also simulates a user gesture.
  GURL user_gesture_redirected_url(
      embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(NavigateToURLFromRenderer(shell(), user_gesture_redirected_url));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(controller.GetCurrentEntryIndex(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);

  // Last entry should not have been marked as skippable.
  EXPECT_FALSE(controller.GetEntryAtIndex(0)->should_skip_on_back_forward_ui());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->should_skip_on_back_forward_ui());
  histograms.ExpectBucketCount(histogram_name, false, 1);

  // Nothing should get skipped when back button is clicked.
  TestNavigationObserver back_nav_load_observer(shell()->web_contents());
  controller.GoBack();
  back_nav_load_observer.Wait();
  EXPECT_EQ(non_skippable_url, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  histograms.ExpectBucketCount("Navigation.BackForward.BackTargetSkipped", 0,
                               1);
}

// Tests that the navigation entry should not be marked as skippable on
// back/forward button if it is navigated away using a browser initiated
// navigation.
IN_PROC_BROWSER_TEST_F(NavigationControllerHistoryInterventionBrowserTest,
                       BrowserInitiatedNavigationDoNotSkipOnBackForward) {
  base::HistogramTester histograms;
  const std::string histogram_name =
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI";

  GURL non_skippable_url(
      embedded_test_server()->GetURL("/frame_tree/top.html"));
  EXPECT_TRUE(NavigateToURL(shell(), non_skippable_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_FALSE(root->HasBeenActivated());
  EXPECT_FALSE(root->HasTransientUserActivation());

  GURL url(embedded_test_server()->GetURL("/title1.html"));

  // Note that NavigateToURL simulates a browser initiated navigation.
  EXPECT_TRUE(NavigateToURL(shell(), url));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(controller.GetCurrentEntryIndex(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);

  // Last entry should not have been marked as skippable.
  EXPECT_FALSE(controller.GetEntryAtIndex(0)->should_skip_on_back_forward_ui());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->should_skip_on_back_forward_ui());
  histograms.ExpectBucketCount(histogram_name, false, 1);

  // Nothing should get skipped when back button is clicked.
  TestNavigationObserver back_nav_load_observer(shell()->web_contents());
  controller.GoBack();
  back_nav_load_observer.Wait();
  EXPECT_EQ(non_skippable_url, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
}

// Tests that the navigation entry that is marked as skippable on back/forward
// button does not get skipped for history.back API calls.
IN_PROC_BROWSER_TEST_F(NavigationControllerHistoryInterventionBrowserTest,
                       SetSkipOnBackDoNotSkipForHistoryBackAPI) {
  base::HistogramTester histograms;

  GURL non_skippable_url(
      embedded_test_server()->GetURL("/frame_tree/top.html"));
  EXPECT_TRUE(NavigateToURL(shell(), non_skippable_url));

  GURL skippable_url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), skippable_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_FALSE(root->HasBeenActivated());
  EXPECT_FALSE(root->HasTransientUserActivation());

  // Navigate to a new same-site document from the renderer without a user
  // gesture.
  GURL redirected_url(embedded_test_server()->GetURL("/title2.html"));
  EXPECT_TRUE(
      NavigateToURLFromRendererWithoutUserGesture(shell(), redirected_url));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(controller.GetCurrentEntryIndex(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);

  // Last entry should have been marked as skippable.
  EXPECT_TRUE(controller.GetEntryAtIndex(1)->should_skip_on_back_forward_ui());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->should_skip_on_back_forward_ui());
  histograms.ExpectBucketCount(
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI", true, 1);

  // Attempt to go back to the skippable entry using the History API should
  // not skip the corresponding entry.
  TestNavigationObserver frame_observer(shell()->web_contents());
  EXPECT_TRUE(ExecuteScript(root, "window.history.back()"));
  frame_observer.Wait();

  histograms.ExpectTotalCount("Navigation.BackForward.BackTargetSkipped", 0);
  EXPECT_EQ(skippable_url, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
}

// Tests that the navigation entry that is marked as skippable on back/forward
// button does not get skipped for history.forward API calls.
IN_PROC_BROWSER_TEST_F(NavigationControllerHistoryInterventionBrowserTest,
                       SetSkipOnBackDoNotSkipForHistoryForwardAPI) {
  base::HistogramTester histograms;

  GURL non_skippable_url(
      embedded_test_server()->GetURL("/frame_tree/top.html"));
  EXPECT_TRUE(NavigateToURL(shell(), non_skippable_url));

  GURL skippable_url(embedded_test_server()->GetURL("/title1.html"));
  EXPECT_TRUE(NavigateToURL(shell(), skippable_url));

  // It is safe to obtain the root frame tree node here, as it doesn't change.
  FrameTreeNode* root = static_cast<WebContentsImpl*>(shell()->web_contents())
                            ->GetFrameTree()
                            ->root();

  EXPECT_FALSE(root->HasBeenActivated());
  EXPECT_FALSE(root->HasTransientUserActivation());

  // Navigate to a new same-site document from the renderer without a user
  // gesture.
  GURL redirected_url(embedded_test_server()->GetURL("/title2.html"));
  EXPECT_TRUE(
      NavigateToURLFromRendererWithoutUserGesture(shell(), redirected_url));

  NavigationControllerImpl& controller = static_cast<NavigationControllerImpl&>(
      shell()->web_contents()->GetController());
  EXPECT_EQ(controller.GetCurrentEntryIndex(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);

  // Last entry should have been marked as skippable.
  EXPECT_TRUE(controller.GetEntryAtIndex(1)->should_skip_on_back_forward_ui());
  EXPECT_FALSE(
      controller.GetLastCommittedEntry()->should_skip_on_back_forward_ui());
  histograms.ExpectBucketCount(
      "Navigation.BackForward.SetShouldSkipOnBackForwardUI", true, 1);

  TestNavigationObserver nav_observer1(shell()->web_contents());
  controller.GoToIndex(0);
  nav_observer1.Wait();
  EXPECT_EQ(non_skippable_url, controller.GetLastCommittedEntry()->GetURL());

  // Attempt to go forward to the skippable entry using the History API should
  // not skip the corresponding entry.
  TestNavigationObserver nav_observer2(shell()->web_contents());
  EXPECT_TRUE(ExecuteScript(root, "window.history.forward()"));
  nav_observer2.Wait();

  histograms.ExpectTotalCount("Navigation.BackForward.ForwardTargetSkipped", 0);
  EXPECT_EQ(skippable_url, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
}

}  // namespace content