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

content/browser/devtools/devtools_manager_impl.cc

 // 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.
 
 #include "content/browser/devtools/devtools_manager_impl.h"
 
 #include <vector>
 
 #include "base/bind.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "content/browser/devtools/devtools_netlog_observer.h"
 #include "content/browser/devtools/render_view_devtools_agent_host.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/devtools_client_host.h"
 
 namespace content {
 
 // static
@@ skipping 161 matching lines @@
 }
 
 void DevToolsManagerImpl::NotifyObservers(DevToolsAgentHost* agent_host,
                                           bool attached) {
   CallbackContainer copy(callbacks_);
   for (CallbackContainer::iterator it = copy.begin(); it != copy.end(); ++it)
      (*it)->Run(agent_host, attached);
 }
 
 }  // namespace content