Use a direct include of the message_loop header in ppapi/, printing/, rlz/, sync/.

sync/notifier/sync_system_resources.h

 // Copyright 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.
 //
 // Simple system resources class that uses the current message loop
 // for scheduling.  Assumes the current message loop is already
 // running.
 
 #ifndef SYNC_NOTIFIER_SYNC_SYSTEM_RESOURCES_H_
 #define SYNC_NOTIFIER_SYNC_SYSTEM_RESOURCES_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.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/threading/non_thread_safe.h"
 #include "google/cacheinvalidation/include/system-resources.h"
 #include "sync/base/sync_export.h"
 #include "sync/notifier/push_client_channel.h"
 #include "sync/notifier/state_writer.h"
 
 namespace notifier {
 class PushClient;
 }  // namespace notifier
 
@@ skipping 113 matching lines @@
   scoped_ptr<SyncLogger> logger_;
   scoped_ptr<SyncInvalidationScheduler> internal_scheduler_;
   scoped_ptr<SyncInvalidationScheduler> listener_scheduler_;
   scoped_ptr<SyncStorage> storage_;
   PushClientChannel push_client_channel_;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_NOTIFIER_SYNC_SYSTEM_RESOURCES_H_