Use std::default_delete as the default deleter for scoped_ptr.

media/renderers/mock_gpu_video_accelerator_factories.h

Index: media/renderers/mock_gpu_video_accelerator_factories.h
diff --git a/media/renderers/mock_gpu_video_accelerator_factories.h b/media/renderers/mock_gpu_video_accelerator_factories.h
index f6c9dd7ad48e175a8ce3a4e76d42f4b12333ddd8..57a73e103f66a991a4af7b9f8cbf6b19eafcadb7 100644
--- a/media/renderers/mock_gpu_video_accelerator_factories.h
+++ b/media/renderers/mock_gpu_video_accelerator_factories.h
@@ -5,6 +5,7 @@
 #ifndef MEDIA_RENDERERS_MOCK_GPU_VIDEO_ACCELERATOR_FACTORIES_H_
 #define MEDIA_RENDERERS_MOCK_GPU_VIDEO_ACCELERATOR_FACTORIES_H_
 
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "media/renderers/gpu_video_accelerator_factories.h"
@@ -12,9 +13,6 @@
 #include "media/video/video_encode_accelerator.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
-template <class T>
-class scoped_refptr;
-
 namespace base {
 class SharedMemory;
 }