Revert 198556 "Implement the rest of the audio API."

trunk/src/ash/system/chromeos/audio/tray_audio.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 "ash/system/chromeos/audio/tray_audio.h"
 
 #include <cmath>
 
 #include "ash/ash_constants.h"
 #include "ash/ash_switches.h"
@@ skipping 578 matching lines @@
       tray_view()->SetVisible(GetInitialVisibility());
 
   if (volume_view_)
     volume_view_->Update();
   else {
     pop_up_volume_view_ = true;
     PopupDetailedView(kTrayPopupAutoCloseDelayInSeconds, false);
   }
 }
 
-void TrayAudio::OnInputGainChanged() {
-}
-
-void TrayAudio::OnInputMuteChanged() {
-}
-
 void TrayAudio::OnAudioNodesChanged() {
   Update();
 }
 
 void TrayAudio::OnActiveOutputNodeChanged() {
   Update();
 }
 
 void TrayAudio::OnActiveInputNodeChanged() {
   Update();
 }
 
 void TrayAudio::Update() {
   if (audio_detail_)
     audio_detail_->Update();
   if (volume_view_)
     volume_view_->Update();
 }
 
 }  // namespace internal
 }  // namespace ash