content/renderer/stats_collection_observer.h

   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
  11 namespace content {
  12
  13 class RenderViewImpl;
  14
  15 // Collect timing information for page loads.
  16 // If a Renderview performs multiple loads, only the first one is recorded.
  17 class StatsCollectionObserver : public RenderViewObserver {
  18  public:
  19   explicit StatsCollectionObserver(RenderViewImpl* render_view);
  20   ~StatsCollectionObserver() override;
  21
  22   // RenderViewObserver implementation
  23   void DidStartLoading() override;
  24   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_