Remove reference counting from media::DemuxerStream and friends.

media/filters/ffmpeg_video_decoder.h

Index: media/filters/ffmpeg_video_decoder.h
diff --git a/media/filters/ffmpeg_video_decoder.h b/media/filters/ffmpeg_video_decoder.h
index 8f854068468f885d16bfea81ed3fd35b984b3e0c..c78882e5dc7d4361ff30b7a8996d06f54dc52d93 100644
--- a/media/filters/ffmpeg_video_decoder.h
+++ b/media/filters/ffmpeg_video_decoder.h
@@ -30,7 +30,7 @@ class MEDIA_EXPORT FFmpegVideoDecoder : public VideoDecoder {
   virtual ~FFmpegVideoDecoder();
 
   // VideoDecoder implementation.
-  virtual void Initialize(const scoped_refptr<DemuxerStream>& stream,
+  virtual void Initialize(DemuxerStream* stream,
                           const PipelineStatusCB& status_cb,
                           const StatisticsCB& statistics_cb) OVERRIDE;
   virtual void Read(const ReadCB& read_cb) OVERRIDE;
@@ -88,7 +88,7 @@ class MEDIA_EXPORT FFmpegVideoDecoder : public VideoDecoder {
   AVFrame* av_frame_;
 
   // Pointer to the demuxer stream that will feed us compressed buffers.
-  scoped_refptr<DemuxerStream> demuxer_stream_;
+  DemuxerStream* demuxer_stream_;
 
   std::list<scoped_refptr<VideoFrame> > decoded_frames_;