Supports multiple active input/output audio nodes in CrasAudioHandler.

ash/system/chromeos/audio/tray_audio_delegate_chromeos.cc

 // Copyright 2014 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_delegate_chromeos.h"
 
 #include "chromeos/audio/cras_audio_handler.h"
 #include "grit/ash_resources.h"
 
 using chromeos::CrasAudioHandler;
 
 namespace ash  {
 namespace system {
 
 void TrayAudioDelegateChromeOs::AdjustOutputVolumeToAudibleLevel() {
   CrasAudioHandler::Get()->AdjustOutputVolumeToAudibleLevel();
 }
 
 int TrayAudioDelegateChromeOs::GetOutputDefaultVolumeMuteLevel() {
   return CrasAudioHandler::Get()->GetOutputDefaultVolumeMuteThreshold();
 }
 
 int TrayAudioDelegateChromeOs::GetOutputVolumeLevel() {
   return CrasAudioHandler::Get()->GetOutputVolumePercent();
 }
 
 int TrayAudioDelegateChromeOs::GetActiveOutputDeviceIconId() {
   chromeos::AudioDevice device;
-  if (!CrasAudioHandler::Get()->GetActiveOutputDevice(&device))
+  if (!CrasAudioHandler::Get()->GetPrimaryActiveOutputDevice(&device))
     return kNoAudioDeviceIcon;
 
   if (device.type == chromeos::AUDIO_TYPE_HEADPHONE)
     return IDR_AURA_UBER_TRAY_AUDIO_HEADPHONE;
   else if (device.type == chromeos::AUDIO_TYPE_USB)
     return IDR_AURA_UBER_TRAY_AUDIO_USB;
   else if (device.type == chromeos::AUDIO_TYPE_BLUETOOTH)
     return IDR_AURA_UBER_TRAY_AUDIO_BLUETOOTH;
   else if (device.type == chromeos::AUDIO_TYPE_HDMI)
     return IDR_AURA_UBER_TRAY_AUDIO_HDMI;
@@ skipping 15 matching lines @@
 void TrayAudioDelegateChromeOs::SetOutputAudioIsMuted(bool is_muted) {
   CrasAudioHandler::Get()->SetOutputMute(is_muted);
 }
 
 void TrayAudioDelegateChromeOs::SetOutputVolumeLevel(int level) {
   CrasAudioHandler::Get()->SetOutputVolumePercent(level);
 }
 
 }  // namespace system
 }  // namespace ash