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

chrome/renderer/audio_message_filter.cc

 // 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.
 
 #include "base/message_loop.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/renderer/audio_message_filter.h"
 #include "ipc/ipc_logging.h"
 
 AudioMessageFilter::AudioMessageFilter(int32 route_id)
@@ skipping 76 matching lines @@
                                               ViewMsg_AudioStreamState state) {
   Delegate* delegate = delegates_.Lookup(stream_id);
   if (!delegate) {
     DLOG(WARNING) << "Got audio stream event for a non-existent or removed"
         " audio renderer.";
     return;
   }
   delegate->OnStateChanged(state);
 }
 
-void AudioMessageFilter::OnStreamVolume(int stream_id,
-                                        double left, double right) {
+void AudioMessageFilter::OnStreamVolume(int stream_id, double volume) {
   Delegate* delegate = delegates_.Lookup(stream_id);
   if (!delegate) {
     DLOG(WARNING) << "Got audio stream event for a non-existent or removed"
         " audio renderer.";
     return;
   }
-  delegate->OnVolume(left, right);
+  delegate->OnVolume(volume);
 }
 
 int32 AudioMessageFilter::AddDelegate(Delegate* delegate) {
   return delegates_.Add(delegate);
 }
 
 void AudioMessageFilter::RemoveDelegate(int32 id) {
   delegates_.Remove(id);
 }