Call GetDefaultOutputDeviceID() from GetDefaultOutputStreamParameters() instead of specifying an em…

media/audio/audio_manager_base.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 "media/audio/audio_manager_base.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 382 matching lines @@
   output_listeners_.RemoveObserver(listener);
 }
 
 void AudioManagerBase::NotifyAllOutputDeviceChangeListeners() {
   DCHECK(message_loop_->BelongsToCurrentThread());
   DVLOG(1) << "Firing OnDeviceChange() notifications.";
   FOR_EACH_OBSERVER(AudioDeviceListener, output_listeners_, OnDeviceChange());
 }
 
 AudioParameters AudioManagerBase::GetDefaultOutputStreamParameters() {
-  return GetPreferredOutputStreamParameters("", AudioParameters());
+  return GetPreferredOutputStreamParameters(GetDefaultOutputDeviceID(),
+      AudioParameters());
 }
 
 AudioParameters AudioManagerBase::GetOutputStreamParameters(
     const std::string& device_id) {
   return GetPreferredOutputStreamParameters(device_id,
       AudioParameters());
 }
 
 AudioParameters AudioManagerBase::GetInputStreamParameters(
     const std::string& device_id) {
   NOTREACHED();
   return AudioParameters();
 }
 
 std::string AudioManagerBase::GetAssociatedOutputDeviceID(
     const std::string& input_device_id) {
   NOTIMPLEMENTED();
   return "";
 }
 
 std::string AudioManagerBase::GetDefaultOutputDeviceID() {
   NOTIMPLEMENTED();
   return "";
 }
 
 }  // namespace media