Fire canplaythrough event at the proper time for audio/video

media/filters/ffmpeg_demuxer.h

Index: media/filters/ffmpeg_demuxer.h
diff --git a/media/filters/ffmpeg_demuxer.h b/media/filters/ffmpeg_demuxer.h
index ddfe51e92e0e9e4c947fd43b5cf093c211c15974..62a8aeca45fd7c39f123dc9101115f79f09f685c 100644
--- a/media/filters/ffmpeg_demuxer.h
+++ b/media/filters/ffmpeg_demuxer.h
@@ -147,6 +147,7 @@ class MEDIA_EXPORT FFmpegDemuxer : public Demuxer, public FFmpegURLProtocol {
       DemuxerStream::Type type) OVERRIDE;
   virtual void SetPreload(Preload preload) OVERRIDE;
   virtual base::TimeDelta GetStartTime() const OVERRIDE;
+  int GetBitrate() OVERRIDE;
 
   // FFmpegURLProtocol implementation.
   virtual size_t Read(size_t size, uint8* data) OVERRIDE;
@@ -161,10 +162,6 @@ class MEDIA_EXPORT FFmpegDemuxer : public Demuxer, public FFmpegURLProtocol {
   // For testing purposes.
   void disable_first_seek_hack_for_testing() { first_seek_hack_ = false; }
 
-  // Returns the bitrate of media file. May be obtained from container or
-  // approximated. Returns 0 if it is unknown.
-  int GetBitrate();
-
  private:
   // Only allow a factory to create this class.
   friend class MockFFmpegDemuxer;