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 8bf7705a6c54d4a86e076f37a1821cd2daa8cfb2..d9f4bd24cf7f35ba500000548c8c5dd4d48bafc2 100644
--- a/media/filters/ffmpeg_demuxer.h
+++ b/media/filters/ffmpeg_demuxer.h
@@ -149,6 +149,7 @@ 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;
@@ -163,10 +164,6 @@ 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;