Merge 105121 - Numerous fixes to audio/video buffered resource loading.

media/filters/ffmpeg_demuxer.h

Index: media/filters/ffmpeg_demuxer.h
===================================================================
--- media/filters/ffmpeg_demuxer.h	(revision 105891)
+++ media/filters/ffmpeg_demuxer.h	(working copy)
@@ -161,6 +161,10 @@
   // 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;