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

content/renderer/media/android/webmediaplayer_android.h

 // Copyright 2013 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_ANDROID_WEBMEDIAPLAYER_ANDROID_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_WEBMEDIAPLAYER_ANDROID_H_
 
 #include <jni.h>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/time/time.h"
 #include "cc/layers/video_frame_provider.h"
 #include "content/renderer/media/android/media_info_loader.h"
 #include "content/renderer/media/android/media_source_delegate.h"
 #include "content/renderer/media/android/stream_texture_factory_android.h"
 #include "content/renderer/media/crypto/proxy_decryptor.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "media/base/android/media_player_android.h"
 #include "media/base/demuxer_stream.h"
 #include "media/base/media_keys.h"
@@ skipping 393 matching lines @@
 
   // The decryptor that manages decryption keys and decrypts encrypted frames.
   scoped_ptr<ProxyDecryptor> decryptor_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_WEBMEDIAPLAYER_ANDROID_H_