Remove use of MessageLoopProxy

shell/task_runners.h

 // Copyright 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.
 
 #ifndef SHELL_TASK_RUNNERS_H_
 #define SHELL_TASK_RUNNERS_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
 
 namespace base {
 class SequencedWorkerPool;
 }
 
 namespace shell {
 
 // A context object that contains the common task runners for the shell's main
 // process.
@@ skipping 20 matching lines @@
   scoped_ptr<base::Thread> io_thread_;
 
   scoped_refptr<base::SequencedWorkerPool> blocking_pool_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskRunners);
 };
 
 }  // namespace shell
 
 #endif  // SHELL_TASK_RUNNERS_H_