Add GetIOMessageLoopProxy method to RenderThread interface.

content/renderer/render_thread_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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 366 matching lines @@
   DCHECK(!lang.empty() ||
       (!parsed_command_line.HasSwitch(switches::kRendererProcess) &&
        !parsed_command_line.HasSwitch(switches::kPluginProcess)));
   return lang;
 }
 
 IPC::SyncMessageFilter* RenderThreadImpl::GetSyncMessageFilter() {
   return sync_message_filter();
 }
 
+scoped_refptr<base::MessageLoopProxy>
+    RenderThreadImpl::GetIOMessageLoopProxy() {
+  return ChildProcess::current()->io_message_loop_proxy();
+}
+
 void RenderThreadImpl::AddRoute(int32 routing_id,
                                 IPC::Channel::Listener* listener) {
   widget_count_++;
   return ChildThread::AddRoute(routing_id, listener);
 }
 
 void RenderThreadImpl::RemoveRoute(int32 routing_id) {
   widget_count_--;
   return ChildThread::RemoveRoute(routing_id);
 }
@@ skipping 569 matching lines @@
 
 scoped_refptr<base::MessageLoopProxy>
 RenderThreadImpl::GetFileThreadMessageLoopProxy() {
   DCHECK(message_loop() == MessageLoop::current());
   if (!file_thread_.get()) {
     file_thread_.reset(new base::Thread("Renderer::FILE"));
     file_thread_->Start();
   }
   return file_thread_->message_loop_proxy();
 }