Replace MessageLoopProxy with SingleThreadTaskRunner for media/filters/ + associated code.

media/filters/mock_gpu_video_accelerator_factories.h

Index: media/filters/mock_gpu_video_accelerator_factories.h
diff --git a/media/filters/mock_gpu_video_accelerator_factories.h b/media/filters/mock_gpu_video_accelerator_factories.h
index 1dfac3da8b4485907dc97be48e5980bbcd9e124c..aee918ac4d4e604634e776837475cd5be90ce0b2 100644
--- a/media/filters/mock_gpu_video_accelerator_factories.h
+++ b/media/filters/mock_gpu_video_accelerator_factories.h
@@ -6,7 +6,7 @@
 #define MEDIA_FILTERS_MOCK_GPU_VIDEO_ACCELERATOR_FACTORIES_H_
 
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
 #include "media/filters/gpu_video_accelerator_factories.h"
 #include "media/video/video_decode_accelerator.h"
 #include "media/video/video_encode_accelerator.h"
@@ -47,7 +47,7 @@ class MockGpuVideoAcceleratorFactories : public GpuVideoAcceleratorFactories {
                     const gfx::Size& size,
                     const SkBitmap& pixels));
   MOCK_METHOD1(CreateSharedMemory, base::SharedMemory*(size_t size));
-  MOCK_METHOD0(GetMessageLoop, scoped_refptr<base::MessageLoopProxy>());
+  MOCK_METHOD0(GetTaskRunner, scoped_refptr<base::SingleThreadTaskRunner>());
   MOCK_METHOD0(Abort, void());
   MOCK_METHOD0(IsAborted, bool());