Use a direct include of the message_loop header in chrome/test/, chrome/tools/, chrome/utility/.

chrome/test/pyautolib/pyautolib.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.
 //
 // This file declares the C++ side of PyAuto, the python interface to
 // Chromium automation.  It access Chromium's internals using Automation Proxy.
 
 #ifndef CHROME_TEST_PYAUTOLIB_PYAUTOLIB_H_
 #define CHROME_TEST_PYAUTOLIB_PYAUTOLIB_H_
 
 #include "base/compiler_specific.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/test/test_timeouts.h"
 #include "base/time/time.h"
 #include "chrome/test/ui/ui_test.h"
 #include "chrome/test/ui/ui_test_suite.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
 #endif
 
 class AutomationProxy;
@@ skipping 89 matching lines @@
   // TestCase at load time itself.
   static base::MessageLoop* GetSharedMessageLoop(
       base::MessageLoop::Type msg_loop_type);
   static base::MessageLoop* message_loop_;
 
   // Path to named channel id.
   std::string named_channel_id_;
 };
 
 #endif  // CHROME_TEST_PYAUTOLIB_PYAUTOLIB_H_