Update includes of message_loop_proxy.

base/message_loop/message_loop_proxy_impl.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_LOOP_PROXY_IMPL_H_
 #define BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_IMPL_H_
 
 #include "base/base_export.h"
 #include "base/message_loop.h"
-#include "base/message_loop_proxy.h"
+#include "base/message_loop/message_loop_proxy.h"
 #include "base/synchronization/lock.h"
 
 namespace base {
 
 // A stock implementation of MessageLoopProxy that is created and managed by a
 // MessageLoop. For now a MessageLoopProxyImpl can only be created as part of a
 // MessageLoop.
 class BASE_EXPORT MessageLoopProxyImpl : public MessageLoopProxy {
  public:
   // MessageLoopProxy implementation
@@ skipping 32 matching lines @@
   // The lock that protects access to target_message_loop_.
   mutable base::Lock message_loop_lock_;
   MessageLoop* target_message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageLoopProxyImpl);
 };
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_IMPL_H_