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

chrome/test/base/view_event_test_base.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 CHROME_TEST_BASE_VIEW_EVENT_TEST_BASE_H_
 #define CHROME_TEST_BASE_VIEW_EVENT_TEST_BASE_H_
 
 // We only want to use ViewEventTestBase in test targets which properly
 // isolate each test case by running each test in a separate process.
 // This way if a test hangs the test launcher can reliably terminate it.
 #if defined(HAS_OUT_OF_PROC_TEST_RUNNER)
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/views/widget/widget_delegate.h"
 
 #if defined(OS_WIN)
 #include "ui/base/win/scoped_ole_initializer.h"
 #endif
 
 namespace aura {
@@ skipping 132 matching lines @@
 // Convenience macro for defining a ViewEventTestBase. See class description
 // of ViewEventTestBase for details.
 #define VIEW_TEST(test_class, name) \
   TEST_F(test_class, name) {\
     StartMessageLoopAndRunTest();\
   }
 
 #endif  // defined(HAS_OUT_OF_PROC_TEST_RUNNER)
 
 #endif  // CHROME_TEST_BASE_VIEW_EVENT_TEST_BASE_H_