SetVolume and GetVolume take one volume instead of separate left and right vo...

chrome/renderer/media/audio_renderer_impl.h

 // Copyright (c) 2009 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.
 //
 // Audio rendering unit utilizing audio output stream provided by browser
 // process through IPC.
 //
 // Relationship of classes.
 //
 //    AudioRendererHost                AudioRendererImpl
@@ skipping 102 matching lines @@
                                          AudioMessageFilter*>(filter);
   }
   static bool IsMediaFormatSupported(const media::MediaFormat& format);
 
   // Methods called on IO thread ----------------------------------------------
   // AudioMessageFilter::Delegate methods, called by AudioMessageFilter.
   void OnRequestPacket(size_t bytes_in_buffer,
                        const base::Time& message_timestamp);
   void OnStateChanged(ViewMsg_AudioStreamState state);
   void OnCreated(base::SharedMemoryHandle handle, size_t length);
-  void OnVolume(double left, double right);
+  void OnVolume(double volume);
 
   // Methods called on pipeline thread ----------------------------------------
   // media::MediaFilter implementation.
   virtual void SetPlaybackRate(float rate);
 
   // media::AudioRenderer implementation.
   virtual void SetVolume(float volume);
 
  protected:
   // Methods called on audio renderer thread ----------------------------------
@@ skipping 18 matching lines @@
 
   // Methods call on IO thread ------------------------------------------------
   // The following methods are tasks posted on the IO thread that needs to
   // be executed on that thread. They interact with AudioMessageFilter and
   // sends IPC messages on that thread.
   void OnCreateStream(AudioManager::Format format, int channels,
                       int sample_rate, int bits_per_sample,
                       size_t packet_size, size_t buffer_capacity);
   void OnPlay();
   void OnPause();
-  void OnSetVolume(double left, double right);
+  void OnSetVolume(double volume);
   void OnNotifyPacketReady();
   void OnDestroy();
 
   // Information about the audio stream.
   int channels_;
   int sample_rate_;
   int sample_bits_;
   size_t bytes_per_second_;
 
   scoped_refptr<AudioMessageFilter> filter_;
@@ skipping 30 matching lines @@
   // State variables for prerolling.
   bool prerolling_;
 
   // Remaining bytes for prerolling to complete.
   size_t preroll_bytes_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_AUDIO_RENDERER_IMPL_H_