Use a direct include of the message_loop header in ui/, part 1.

ui/aura/root_window_host_ozone.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 UI_AURA_ROOT_WINDOW_HOST_OZONE_H_
 #define UI_AURA_ROOT_WINDOW_HOST_OZONE_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "ui/aura/root_window_host.h"
 #include "ui/base/ozone/event_factory_ozone.h"
 #include "ui/gfx/rect.h"
 
 namespace aura {
 
 class RootWindowHostOzone : public RootWindowHost,
                             public base::MessageLoop::Dispatcher {
  public:
   explicit RootWindowHostOzone(const gfx::Rect& bounds);
@@ skipping 37 matching lines @@
   // EventFactoryEvdev reads from /dev/input/* file descriptors and creates
   // ui::Events from them.
   scoped_ptr<ui::EventFactoryOzone> factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindowHostOzone);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_HOST_OZONE_H_