Remove GetVolume from media::AudioRendererSink.

content/renderer/media/audio_input_device.cc

 // 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.
 
 #include "content/renderer/media/audio_input_device.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time.h"
@@ skipping 68 matching lines @@
 bool AudioInputDevice::SetVolume(double volume) {
   if (volume < 0 || volume > 1.0)
     return false;
 
   message_loop()->PostTask(FROM_HERE,
       base::Bind(&AudioInputDevice::SetVolumeOnIOThread, this, volume));
 
   return true;
 }
 
-bool AudioInputDevice::GetVolume(double* volume) {
-  NOTREACHED();
-  return false;
-}
-
 void AudioInputDevice::SetAutomaticGainControl(bool enabled) {
   DVLOG(1) << "SetAutomaticGainControl(enabled=" << enabled << ")";
   message_loop()->PostTask(FROM_HERE,
       base::Bind(&AudioInputDevice::SetAutomaticGainControlOnIOThread,
           this, enabled));
 }
 
 void AudioInputDevice::OnStreamCreated(
     base::SharedMemoryHandle handle,
     base::SyncSocket::Handle socket_handle,
@@ skipping 234 matching lines @@
                                     channel_index,
                                     bytes_per_sample,
                                     number_of_frames);
   }
 
   // Deliver captured data to the client in floating point format
   // and update the audio-delay measurement.
   capture_callback_->Capture(audio_data_, number_of_frames,
                              audio_delay_milliseconds, volume);
 }