Attempt four at landing the "histogram.h removed from message_loop.h" patch.

chrome/service/service_process.h

 // Copyright (c) 2010 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_SERVICE_SERVICE_PROCESS_H_
 #define CHROME_SERVICE_SERVICE_PROCESS_H_
 
 #include <vector>
 
 #include "base/ref_counted.h"
+#include "base/scoped_ptr.h"
 #include "base/thread.h"
 
 class CloudPrintProxy;
 class JsonPrefStore;
 namespace net {
 class NetworkChangeNotifier;
 }
 
 namespace remoting {
 class ChromotingHost;
@@ skipping 45 matching lines @@
   scoped_ptr<base::Thread> file_thread_;
   std::vector<CloudPrintProxy*> cloud_print_proxy_list_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceProcess);
 };
 
 extern ServiceProcess* g_service_process;
 
 #endif  // CHROME_SERVICE_SERVICE_PROCESS_H_