chrome/browser/page_load_metrics/page_load_metrics_initialize.cc

// 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 "chrome/browser/page_load_metrics/page_load_metrics_initialize.h"

#include "chrome/browser/browser_process.h"
#include "chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.h"
#include "chrome/browser/page_load_metrics/observers/google_captcha_observer.h"
#include "chrome/browser/page_load_metrics/observers/stale_while_revalidate_metrics_observer.h"
#include "chrome/browser/prerender/prerender_contents.h"
#include "components/page_load_metrics/browser/metrics_web_contents_observer.h"
#include "components/rappor/rappor_service.h"
#include "content/public/browser/web_contents.h"

namespace {

void RegisterPageLoadMetricsObservers(
    page_load_metrics::PageLoadMetricsObservable* metrics) {
  // Attach observers scoped to the web contents here.

  // This is a self-destruct class, and will delete itself when triggered by
  // OnPageLoadMetricsGoingAway.
  metrics->AddObserver(new FromGWSPageLoadMetricsObserver(metrics));
  metrics->AddObserver(
      new google_captcha_observer::GoogleCaptchaObserver(metrics));
  // StaleWhileRevalidateMetricsObserver also deletes itself from
  // OnPageLoadMetricsGoingAway.
  // TODO(ricea): Remove this in April 2016 or before. crbug.com/348877
  metrics->AddObserver(
      new chrome::StaleWhileRevalidateMetricsObserver(metrics));
}

}  // namespace

namespace chrome {

void InitializePageLoadMetricsForWebContents(
    content::WebContents* web_contents) {
  RegisterPageLoadMetricsObservers(
      page_load_metrics::MetricsWebContentsObserver::CreateForWebContents(
          web_contents,
          make_scoped_ptr(new PageLoadMetricsEmbedderInterfaceImpl())));
}

PageLoadMetricsEmbedderInterfaceImpl::~PageLoadMetricsEmbedderInterfaceImpl() {}

rappor::RapporService*
PageLoadMetricsEmbedderInterfaceImpl::GetRapporService() {
  // During the browser process shutdown path, calling this getter can
  // reinitialize multiple destroyed objects. This alters shutdown ordering.
  if (g_browser_process->IsShuttingDown())
    return nullptr;
  return g_browser_process->rappor_service();
}

bool PageLoadMetricsEmbedderInterfaceImpl::IsPrerendering(
    content::WebContents* web_contents) {
  return prerender::PrerenderContents::FromWebContents(web_contents) != nullptr;
}

}  // namespace chrome