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

base/message_loop/message_pump_aurax11.h

 // 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.
 
 #ifndef BASE_MESSAGE_LOOP_MESSAGE_PUMP_AURAX11_H
 #define BASE_MESSAGE_LOOP_MESSAGE_PUMP_AURAX11_H
 
 #include <bitset>
 #include <map>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_pump.h"
 #include "base/message_loop/message_pump_dispatcher.h"
 #include "base/message_loop/message_pump_glib.h"
 #include "base/message_loop/message_pump_observer.h"
 #include "base/observer_list.h"
 
 // It would be nice to include the X11 headers here so that we use Window
 // instead of its typedef of unsigned long, but we can't because everything in
-// chrome includes us through base/message_loop.h, and X11's crappy #define
-// heavy headers muck up half of chrome.
+// chrome includes us through base/message_loop/message_loop.h, and X11's crappy
+// #define heavy headers muck up half of chrome.
 
 typedef struct _GPollFD GPollFD;
 typedef struct _GSource GSource;
 typedef struct _XDisplay Display;
 
 namespace base {
 
 // This class implements a message-pump for dispatching X events.
 //
 // If there's a current dispatcher given through RunWithDispatcher(), that
@@ skipping 81 matching lines @@
   unsigned long x_root_window_;
 
   DISALLOW_COPY_AND_ASSIGN(MessagePumpAuraX11);
 };
 
 typedef MessagePumpAuraX11 MessagePumpForUI;
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_LOOP_MESSAGE_PUMP_AURAX11_H