Supports multiple active input/output audio nodes in CrasAudioHandler.

chrome/browser/chromeos/login/ui/login_display_host_impl.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 "chrome/browser/chromeos/login/ui/login_display_host_impl.h"
 
 #include <vector>
 
 #include "ash/audio/sounds.h"
 #include "ash/desktop_background/desktop_background_controller.h"
@@ skipping 1104 matching lines @@
 void LoginDisplayHostImpl::OnAuthPrewarmDone() {
   auth_prewarmer_.reset();
 }
 
 void LoginDisplayHostImpl::SetOobeProgressBarVisible(bool visible) {
   GetOobeUI()->ShowOobeUI(visible);
 }
 
 void LoginDisplayHostImpl::TryToPlayStartupSound() {
   if (startup_sound_played_ || login_prompt_visible_time_.is_null() ||
-      !CrasAudioHandler::Get()->GetActiveOutputNode()) {
+      !CrasAudioHandler::Get()->GetPrimaryActiveOutputNode()) {
     return;
   }
 
   startup_sound_played_ = true;
 
   // Don't try play startup sound if login prompt is already visible
   // for a long time or can't be played.
   if (base::TimeTicks::Now() - login_prompt_visible_time_ >
       base::TimeDelta::FromMilliseconds(kStartupSoundMaxDelayMs)) {
     EnableSystemSoundsForAccessibility();
@@ skipping 157 matching lines @@
   scoped_ptr<locale_util::SwitchLanguageCallback> callback(
       new locale_util::SwitchLanguageCallback(
           base::Bind(&OnLanguageSwitchedCallback, base::Passed(data.Pass()))));
 
   // Load locale keyboards here. Hardware layout would be automatically enabled.
   locale_util::SwitchLanguage(
       locale, true, true /* login_layouts_only */, callback.Pass());
 }
 
 }  // namespace chromeos