Replace MessageLoopProxy with SingleThreadTaskRunner for the rest of media/.

media/audio/audio_low_latency_input_output_unittest.cc

Index: media/audio/audio_low_latency_input_output_unittest.cc
diff --git a/media/audio/audio_low_latency_input_output_unittest.cc b/media/audio/audio_low_latency_input_output_unittest.cc
index a616761294db9e57b27051ad1d830fc464b0c3ce..3427ca37079b222ad3b4a4f78d6bf51efb2c0d40 100644
--- a/media/audio/audio_low_latency_input_output_unittest.cc
+++ b/media/audio/audio_low_latency_input_output_unittest.cc
@@ -6,7 +6,6 @@
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/synchronization/lock.h"
 #include "base/test/test_timeouts.h"
@@ -83,7 +82,7 @@ class MockAudioManager : public AudioManagerAnyPlatform {
   MockAudioManager() {}
   virtual ~MockAudioManager() {}
 
-  virtual scoped_refptr<base::MessageLoopProxy> GetMessageLoop() OVERRIDE {
+  virtual scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() OVERRIDE {
     return base::MessageLoop::current()->message_loop_proxy();
   }