Replace MessageLoopProxy with SingleThreadTaskRunner for the rest of media/.

media/audio/audio_manager_base.h

Index: media/audio/audio_manager_base.h
diff --git a/media/audio/audio_manager_base.h b/media/audio/audio_manager_base.h
index 8fbe97785518911afd90bc17fc121927d6c585c1..641a6db2683833fa6124afbc15177088a20b86cc 100644
--- a/media/audio/audio_manager_base.h
+++ b/media/audio/audio_manager_base.h
@@ -52,8 +52,9 @@ class MEDIA_EXPORT AudioManagerBase : public AudioManager {
 
   virtual ~AudioManagerBase();
 
-  virtual scoped_refptr<base::MessageLoopProxy> GetMessageLoop() OVERRIDE;
-  virtual scoped_refptr<base::MessageLoopProxy> GetWorkerLoop() OVERRIDE;
+  virtual scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() OVERRIDE;
+  virtual scoped_refptr<base::SingleThreadTaskRunner> GetWorkerTaskRunner()
+      OVERRIDE;
 
   virtual string16 GetAudioInputDeviceModel() OVERRIDE;
 
@@ -187,10 +188,10 @@ class MEDIA_EXPORT AudioManagerBase : public AudioManager {
   scoped_ptr<base::Thread> audio_thread_;
   mutable base::Lock audio_thread_lock_;
 
-  // The message loop of the audio thread this object runs on. Used for internal
+  // The task runner of the audio thread this object runs on. Used for internal
   // tasks which run on the audio thread even after Shutdown() has been started
   // and GetMessageLoop() starts returning NULL.
-  scoped_refptr<base::MessageLoopProxy> message_loop_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   // Map of cached AudioOutputDispatcher instances.  Must only be touched
   // from the audio thread (no locking).