| // Copyright 2015 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/common/site_isolation_policy.h" |
| |
| #include "base/command_line.h" |
| #include "base/lazy_instance.h" |
| #include "content/public/common/browser_plugin_guest_mode.h" |
| #include "content/public/common/browser_side_navigation_policy.h" |
| #include "content/public/common/content_client.h" |
| #include "content/public/common/content_switches.h" |
| |
| namespace content { |
| |
| // static |
| bool SiteIsolationPolicy::AreCrossProcessFramesPossible() { |
| return UseDedicatedProcessesForAllSites() || |
| IsTopDocumentIsolationEnabled() || |
| GetContentClient()->IsSupplementarySiteIsolationModeEnabled() || |
| BrowserPluginGuestMode::UseCrossProcessFramesForGuests(); |
| } |
| |
| // static |
| bool SiteIsolationPolicy::UseDedicatedProcessesForAllSites() { |
| return base::CommandLine::ForCurrentProcess()->HasSwitch( |
| switches::kSitePerProcess); |
| } |
| |
| // static |
| bool SiteIsolationPolicy::IsTopDocumentIsolationEnabled() { |
| // --site-per-process trumps --top-document-isolation. |
| if (UseDedicatedProcessesForAllSites()) |
| return false; |
| |
| return base::CommandLine::ForCurrentProcess()->HasSwitch( |
| switches::kTopDocumentIsolation); |
| } |
| |
| // static |
| bool SiteIsolationPolicy::UseSubframeNavigationEntries() { |
| // Enable the new navigation history behavior if any manner of site isolation |
| // is active. |
| // PlzNavigate: also enable the new navigation history behavior. |
| return AreCrossProcessFramesPossible() || IsBrowserSideNavigationEnabled(); |
| } |
| |
| } // namespace content |