Cache effective frame count. Make expired frame count useful.

media/renderers/video_renderer_impl.h

 // Copyright 2013 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 MEDIA_RENDERERS_VIDEO_RENDERER_IMPL_H_
 #define MEDIA_RENDERERS_VIDEO_RENDERER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 126 matching lines @@
   void StopSink();
 
   // Fires |ended_cb_| if there are no remaining usable frames and
   // |received_end_of_stream_| is true.  Sets |rendered_end_of_stream_| if it
   // does so.
   //
   // When called from the media thread, |time_progressing| should reflect the
   // value of |time_progressing_|.  When called from Render() on the sink
   // callback thread, the inverse of |render_first_frame_and_stop_| should be
   // used as a proxy for |time_progressing_|.
-  //
-  // Returns algorithm_->EffectiveFramesQueued().
-  size_t MaybeFireEndedCallback_Locked(bool time_progressing);
+  void MaybeFireEndedCallback_Locked(bool time_progressing);
 
   // Helper method for converting a single media timestamp to wall clock time.
   base::TimeTicks ConvertMediaTimestamp(base::TimeDelta media_timestamp);
 
   base::TimeTicks GetCurrentMediaTimeAsWallClockTime();
 
   // Helper method for checking if a frame timestamp plus the frame's expected
   // duration is before |start_timestamp_|.
   bool IsBeforeStartTime(base::TimeDelta timestamp);
 
@@ skipping 111 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<VideoRendererImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_VIDEO_RENDERER_IMPL_H_