Remove reference counting from media::DemuxerStream and friends.

media/filters/decrypting_video_decoder.h

Index: media/filters/decrypting_video_decoder.h
diff --git a/media/filters/decrypting_video_decoder.h b/media/filters/decrypting_video_decoder.h
index eb6923fcfc3f9b39f6558c798dcac7c49bebc064..a128a42f79c9f4bdd3a4d67d872edc6f9b8315d0 100644
--- a/media/filters/decrypting_video_decoder.h
+++ b/media/filters/decrypting_video_decoder.h
@@ -32,7 +32,7 @@ class MEDIA_EXPORT DecryptingVideoDecoder : public VideoDecoder {
   virtual ~DecryptingVideoDecoder();
 
   // 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;
@@ -100,7 +100,7 @@ class MEDIA_EXPORT DecryptingVideoDecoder : public VideoDecoder {
   base::Closure reset_cb_;
 
   // Pointer to the demuxer stream that will feed us compressed buffers.
-  scoped_refptr<DemuxerStream> demuxer_stream_;
+  DemuxerStream* demuxer_stream_;
 
   // Callback to request/cancel decryptor creation notification.
   SetDecryptorReadyCB set_decryptor_ready_cb_;