Revert of content/common: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/common/gpu/media/fake_video_decode_accelerator.h

Index: content/common/gpu/media/fake_video_decode_accelerator.h
diff --git a/content/common/gpu/media/fake_video_decode_accelerator.h b/content/common/gpu/media/fake_video_decode_accelerator.h
index a669c82387dd622e61a6f045468afeed5053da2e..de7df4ae7a52505dfbbedb16615e191b20758cab 100644
--- a/content/common/gpu/media/fake_video_decode_accelerator.h
+++ b/content/common/gpu/media/fake_video_decode_accelerator.h
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
+#include "base/message_loop/message_loop_proxy.h"
 #include "content/common/content_export.h"
 #include "media/video/video_decode_accelerator.h"
 #include "ui/gfx/geometry/size_f.h"
@@ -42,7 +43,7 @@
   // The message loop that created the class. Used for all callbacks. This
   // class expects all calls to this class to be on this message loop (not
   // checked).
-  const scoped_refptr<base::SingleThreadTaskRunner> child_task_runner_;
+  const scoped_refptr<base::MessageLoopProxy> child_message_loop_proxy_;
 
   Client* client_;