content/child: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/child/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_CHILD_CHILD_PROCESS_H_
 #define CONTENT_CHILD_CHILD_PROCESS_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 25 matching lines @@
   virtual ~ChildProcess();
 
   // May be NULL if the main thread hasn't been set explicitly.
   ChildThreadImpl* main_thread();
 
   // Sets the object associated with the main thread of this process.
   // Takes ownership of the pointer.
   void set_main_thread(ChildThreadImpl* thread);
 
   base::MessageLoop* io_message_loop() { return io_thread_.message_loop(); }
-  base::MessageLoopProxy* io_message_loop_proxy() {
-    return io_thread_.message_loop_proxy().get();
+  base::SingleThreadTaskRunner* io_task_runner() {
+    return io_thread_.task_runner().get();
   }
 
   // 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
   // up waiting.
   // For example, see the renderer code used to implement GetCookies().
@@ skipping 24 matching lines @@
   // it depends on it (indirectly through IPC::SyncChannel).  Same for
   // io_thread_.
   scoped_ptr<ChildThreadImpl> main_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcess);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_CHILD_PROCESS_H_