Clean up the media stream audio track code

content/renderer/media/media_stream_audio_sink_owner.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SINK_OWNER_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SINK_OWNER_H_
 
 #include <vector>
 
 #include "base/synchronization/lock.h"
 #include "content/renderer/media/media_stream_audio_track_sink.h"
 
 namespace content {
 
 class MediaStreamAudioSink;
 
 // Reference counted holder of MediaStreamAudioSink sinks.
 class MediaStreamAudioSinkOwner : public MediaStreamAudioTrackSink {
  public:
   explicit MediaStreamAudioSinkOwner(MediaStreamAudioSink* sink);
 
   // MediaStreamAudioTrackSink implementation.
-  int OnData(const int16* audio_data,
-             int sample_rate,
-             int number_of_channels,
-             int number_of_frames,
-             const std::vector<int>& channels,
-             int audio_delay_milliseconds,
-             int current_volume,
-             bool need_audio_processing,
-             bool key_pressed) override;
+  void OnData(const int16* audio_data,
+              int sample_rate,
+              int number_of_channels,
+              int number_of_frames) override;
   void OnSetFormat(const media::AudioParameters& params) override;
   void OnReadyStateChanged(
       blink::WebMediaStreamSource::ReadyState state) override;
   void Reset() override;
   bool IsEqual(const MediaStreamAudioSink* other) const override;
-  bool IsEqual(const PeerConnectionAudioSink* other) const override;
 
  protected:
   ~MediaStreamAudioSinkOwner() override {}
 
  private:
   mutable base::Lock lock_;
 
   // Raw pointer to the delegate, the client need to call Reset() to set the
   // pointer to NULL before the delegate goes away.
   MediaStreamAudioSink* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamAudioSinkOwner);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SINK_OWNER_H_