PageLoadMetrics renderer and browser implementation (deprecated)

components/page_load_metrics/browser/page_load_metrics_web_contents_observer.h

+// 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.
+
+#ifndef COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_WEB_CONTENTS_OBSERVER_H_
+#define COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_WEB_CONTENTS_OBSERVER_H_
+
+#include "base/macros.h"
+#include "base/time/time.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+
+namespace content {
+class RenderFrameHost;
+}  // namespace content
+
+namespace IPC {
+class Message;
+}  // namespace IPC
+
+namespace page_load_metrics {
+
+// PageLoadMetricsWebContentsObserver logs page load UMA metrics based on
+// IPC messages received from a PageLoadMetricsRenderFrameObserver.
+class PageLoadMetricsWebContentsObserver
+    : public content::WebContentsObserver,
+      public content::WebContentsUserData<PageLoadMetricsWebContentsObserver> {
+ public:
+  ~PageLoadMetricsWebContentsObserver() override;
+
+  bool OnMessageReceived(const IPC::Message& message,
+                         content::RenderFrameHost* render_frame_host) override;
+
+ private:
+  explicit PageLoadMetricsWebContentsObserver(
+      content::WebContents* web_contents);
+  friend class content::WebContentsUserData<PageLoadMetricsWebContentsObserver>;
+  friend class PageLoadMetricsWebContentsObserverTest;
+
+  void OnDOMContentLoadedEvent(base::TimeDelta dom_content_loaded);
+  void OnLoadEvent(base::TimeDelta loaded);
+  void OnFirstLayout(base::TimeDelta first_layout);
+
+  DISALLOW_COPY_AND_ASSIGN(PageLoadMetricsWebContentsObserver);
+};
+
+}  // namespace page_load_metrics
+
+#endif  // COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_WEB_CONTENTS_OBSERVER_H_