Revert of Add Stop() to AudioDecoder.

media/filters/opus_audio_decoder.h

Index: media/filters/opus_audio_decoder.h
diff --git a/media/filters/opus_audio_decoder.h b/media/filters/opus_audio_decoder.h
index 2faacedd83b34856a815b3525e94d319e12d0319..d5eb595cd1045c6558831ebc84674ca147f1a2f1 100644
--- a/media/filters/opus_audio_decoder.h
+++ b/media/filters/opus_audio_decoder.h
@@ -40,16 +40,13 @@
   virtual ChannelLayout channel_layout() OVERRIDE;
   virtual int samples_per_second() OVERRIDE;
   virtual void Reset(const base::Closure& closure) OVERRIDE;
-  virtual void Stop(const base::Closure& closure) OVERRIDE;
 
  private:
-  void DoReset();
-  void DoStop();
-
   // Reads from the demuxer stream with corresponding callback method.
   void ReadFromDemuxerStream();
   void BufferReady(DemuxerStream::Status status,
                    const scoped_refptr<DecoderBuffer>& input);
+
 
   bool ConfigureDecoder();
   void CloseDecoder();
@@ -76,8 +73,6 @@
   base::TimeDelta last_input_timestamp_;
 
   ReadCB read_cb_;
-  base::Closure reset_cb_;
-  base::Closure stop_cb_;
 
   // Number of frames to be discarded from the start of the packet. This value
   // is respected for all packets except for the first one in the stream. For