1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CONTENT_RENDERER_STATS_COLLECTION_OBSERVER_H_
6#define CONTENT_RENDERER_STATS_COLLECTION_OBSERVER_H_
7
8#include "base/time/time.h"
9#include "content/public/renderer/render_view_observer.h"
10
11namespace content {
12
13class RenderViewImpl;
14
15// Collect timing information for page loads.
16// If a Renderview performs multiple loads, only the first one is recorded.
17class StatsCollectionObserver : public RenderViewObserver {
18 public:
19  explicit StatsCollectionObserver(RenderViewImpl* render_view);
20  virtual ~StatsCollectionObserver();
21
22  // RenderViewObserver implementation
23  virtual void DidStartLoading() OVERRIDE;
24  virtual void DidStopLoading() OVERRIDE;
25
26  // Timing for the page load start and stop.  These functions may return
27  // a null time value under various circumstances.
28  const base::Time& load_start_time() { return start_time_; }
29  const base::Time& load_stop_time() { return stop_time_; }
30
31 private:
32  base::Time start_time_;
33  base::Time stop_time_;
34
35   DISALLOW_COPY_AND_ASSIGN(StatsCollectionObserver);
36};
37
38}  // namespace content
39
40#endif  // CONTENT_RENDERER_STATS_COLLECTION_OBSERVER_H_
41