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      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   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