Add AudioManager::GetAudioOutputDeviceNames and implement for pulseaudio.

media/audio/mock_audio_manager.h

 // 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.
 
 #ifndef MEDIA_AUDIO_MOCK_AUDIO_MANAGER_H_
 #define MEDIA_AUDIO_MOCK_AUDIO_MANAGER_H_
 
 #include "media/audio/audio_manager.h"
 
 namespace media {
@@ skipping 16 matching lines @@
 
   virtual bool HasAudioInputDevices() OVERRIDE;
 
   virtual string16 GetAudioInputDeviceModel() OVERRIDE;
 
   virtual void ShowAudioInputSettings() OVERRIDE;
 
   virtual void GetAudioInputDeviceNames(
       media::AudioDeviceNames* device_names) OVERRIDE;
 
+  virtual void GetAudioOutputDeviceNames(
+      media::AudioDeviceNames* device_names) OVERRIDE;
+
   virtual media::AudioOutputStream* MakeAudioOutputStream(
       const media::AudioParameters& params,
       const std::string& device_id,
       const std::string& input_device_id) OVERRIDE;
 
   virtual media::AudioOutputStream* MakeAudioOutputStreamProxy(
       const media::AudioParameters& params,
       const std::string& device_id,
       const std::string& input_device_id) OVERRIDE;
 
@@ skipping 21 matching lines @@
   virtual ~MockAudioManager();
 
   scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(MockAudioManager);
 };
 
 }  // namespace media.
 
 #endif  // MEDIA_AUDIO_MOCK_AUDIO_MANAGER_H_