Replace MessageLoopProxy with SingleThreadTaskRunner for the rest of media/.

media/audio/mock_audio_manager.h

Index: media/audio/mock_audio_manager.h
diff --git a/media/audio/mock_audio_manager.h b/media/audio/mock_audio_manager.h
index 2e2f49b9519eb22859175ce0cb99d79e3b23386d..7aad693abdbe59de29ec817c4ee63fb206f81825 100644
--- a/media/audio/mock_audio_manager.h
+++ b/media/audio/mock_audio_manager.h
@@ -21,7 +21,8 @@ namespace media {
 //    synchronization purposes).
 class MockAudioManager : public media::AudioManager {
  public:
-  explicit MockAudioManager(base::MessageLoopProxy* message_loop_proxy);
+  explicit MockAudioManager(
+      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
 
   virtual bool HasAudioOutputDevices() OVERRIDE;
 
@@ -51,8 +52,9 @@ class MockAudioManager : public media::AudioManager {
       const media::AudioParameters& params,
       const std::string& device_id) OVERRIDE;
 
-  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 void AddOutputDeviceChangeListener(
       AudioDeviceListener* listener) OVERRIDE;
@@ -70,7 +72,7 @@ class MockAudioManager : public media::AudioManager {
  protected:
   virtual ~MockAudioManager();
 
-  scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(MockAudioManager);
 };