content: Use base::MessageLoop.

content/common/child_process.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 CONTENT_COMMON_CHILD_PROCESS_H_
 #define CONTENT_COMMON_CHILD_PROCESS_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread.h"
@@ skipping 12 matching lines @@
   ChildProcess();
   virtual ~ChildProcess();
 
   // May be NULL if the main thread hasn't been set explicitly.
   ChildThread* main_thread();
 
   // Sets the object associated with the main thread of this process.
   // Takes ownership of the pointer.
   void set_main_thread(ChildThread* thread);
 
-  MessageLoop* io_message_loop() { return io_thread_.message_loop(); }
+  base::MessageLoop* io_message_loop() { return io_thread_.message_loop(); }
   base::MessageLoopProxy* io_message_loop_proxy() {
     return io_thread_.message_loop_proxy();
   }
 
   // A global event object that is signalled when the main thread's message
   // loop exits.  This gives background threads a way to observe the main
   // thread shutting down.  This can be useful when a background thread is
   // waiting for some information from the browser process.  If the browser
   // process goes away prematurely, the background thread can at least notice
   // the child processes's main thread exiting to determine that it should give
@@ skipping 29 matching lines @@
 
   // The singleton instance for this process.
   static ChildProcess* child_process_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcess);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_CHILD_PROCESS_H_