Use a direct include of the message_loop header in media/.

media/audio/fake_audio_output_stream.cc

 // 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.
 
 #include "media/audio/fake_audio_output_stream.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "media/audio/audio_manager_base.h"
 
 namespace media {
 
 // static
 AudioOutputStream* FakeAudioOutputStream::MakeFakeStream(
     AudioManagerBase* manager, const AudioParameters& params) {
   return new FakeAudioOutputStream(manager, params);
 }
 
@@ skipping 37 matching lines @@
 void FakeAudioOutputStream::GetVolume(double* volume) {
   *volume = 0;
 };
 
 void FakeAudioOutputStream::CallOnMoreData(AudioBus* audio_bus) {
   DCHECK(audio_manager_->GetMessageLoop()->BelongsToCurrentThread());
   callback_->OnMoreData(audio_bus, AudioBuffersState());
 }
 
 }  // namespace media