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

ui/aura/test/ui_controls_factory_aurawin.cc

 // 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.
 
 #include "base/basictypes.h"
 #include "base/logging.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/test/ui_controls_factory_aura.h"
 #include "ui/base/test/ui_controls_aura.h"
 #include "ui/base/test/ui_controls_internal_win.h"
 
 namespace aura {
 namespace test {
 
 namespace {
 
@@ skipping 64 matching lines @@
 };
 
 }  // namespace
 
 UIControlsAura* CreateUIControlsAura(aura::RootWindow* root_window) {
   return new UIControlsWin();
 }
 
 }  // namespace test
 }  // namespace aura