Remove GetVolume from media::AudioRendererSink.

media/base/audio_renderer_mixer_input.h

 // Copyright (c) 2012 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 MEDIA_BASE_AUDIO_RENDERER_MIXER_INPUT_H_
 #define MEDIA_BASE_AUDIO_RENDERER_MIXER_INPUT_H_
 
 #include <vector>
 
 #include "media/base/audio_renderer_sink.h"
@@ skipping 13 matching lines @@
   const std::vector<float*>& audio_data() { return audio_data_; }
   AudioRendererSink::RenderCallback* callback() { return callback_; }
   bool playing() { return playing_; }
 
   // AudioRendererSink implementation.
   virtual void Start() OVERRIDE;
   virtual void Stop() OVERRIDE;
   virtual void Play() OVERRIDE;
   virtual void Pause(bool flush) OVERRIDE;
   virtual bool SetVolume(double volume) OVERRIDE;
-  virtual void GetVolume(double* volume) OVERRIDE;
   virtual void Initialize(const AudioParameters& params,
                           AudioRendererSink::RenderCallback* renderer) OVERRIDE;
 
+  void GetVolume(double* volume);
+
  protected:
   virtual ~AudioRendererMixerInput();
 
  private:
   bool playing_;
   bool initialized_;
   double volume_;
 
   // AudioRendererMixer is reference counted by all its AudioRendererMixerInputs
   // and is destroyed when all AudioRendererMixerInputs have called RemoveMixer.
   scoped_refptr<AudioRendererMixer> mixer_;
 
   // Source of audio data which is provided to the mixer.
   AudioRendererSink::RenderCallback* callback_;
 
   // Vector for rendering audio data which will be used by the mixer.
   std::vector<float*> audio_data_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererMixerInput);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_RENDERER_MIXER_INPUT_H_