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

content/browser/gpu/gpu_info_browsertest.cc

 // Copyright (c) 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/command_line.h"
 #include "base/logging.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/public/browser/gpu_data_manager_observer.h"
 #include "content/public/common/content_switches.h"
 #include "content/test/content_browser_test.h"
 #include "ui/compositor/compositor_setup.h"
 
 namespace content {
 
@@ skipping 77 matching lines @@
 #endif
   TestObserver observer(GetMessageLoop());
   GpuDataManagerImpl::GetInstance()->AddObserver(&observer);
   GpuDataManagerImpl::GetInstance()->RequestCompleteGpuInfoIfNeeded();
 
   GetMessageLoop()->Run();
 }
 
 }  // namespace content