Add methods for telling V8 how much memory audio/video is using.

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 <deque>
 
 #include "base/memory/ref_counted.h"
@@ skipping 238 matching lines @@
   // Indicates whether or not media time is currently progressing or not.  Must
   // only be accessed from |task_runner_|.
   bool time_progressing_;
 
   // Indicates that Render() should only render the first frame and then request
   // that the sink be stopped.  |posted_maybe_stop_after_first_paint_| is used
   // to avoid repeated task posts.
   bool render_first_frame_and_stop_;
   bool posted_maybe_stop_after_first_paint_;
 
+  // Memory usage of |algorithm_| recorded during the last UpdateStats_Locked()
+  // call.
+  int64_t last_video_memory_usage_;
+
   // 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_