Use a direct include of the message_loop header in content/, part 4.

content/renderer/media/pepper_platform_video_decoder_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_MEDIA_PEPPER_PLATFORM_VIDEO_DECODER_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_PEPPER_PLATFORM_VIDEO_DECODER_IMPL_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "media/video/video_decode_accelerator.h"
 #include "webkit/plugins/ppapi/plugin_delegate.h"
 
 namespace content {
 
 class PlatformVideoDecoderImpl
     : public webkit::ppapi::PluginDelegate::PlatformVideoDecoder,
       public media::VideoDecodeAccelerator::Client {
  public:
   PlatformVideoDecoderImpl(
@@ skipping 38 matching lines @@
 
   // Holds a GpuVideoDecodeAcceleratorHost.
   scoped_ptr<media::VideoDecodeAccelerator> decoder_;
 
   DISALLOW_COPY_AND_ASSIGN(PlatformVideoDecoderImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_PEPPER_PLATFORM_VIDEO_DECODER_IMPL_H_