Remove all remaining traces of MessageLoopProxy.

components/nacl/renderer/trusted_plugin_channel.cc

 // Copyright 2014 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 "components/nacl/renderer/trusted_plugin_channel.h"
 
 #include "base/callback_helpers.h"
 #include "components/nacl/common/nacl_renderer_messages.h"
 #include "components/nacl/renderer/histogram.h"
 #include "components/nacl/renderer/nexe_load_manager.h"
 #include "content/public/renderer/render_thread.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ipc/ipc_message_macros.h"
 #include "ppapi/c/pp_errors.h"
 
 namespace nacl {
 
 TrustedPluginChannel::TrustedPluginChannel(
     NexeLoadManager* nexe_load_manager,
     const IPC::ChannelHandle& handle,
     base::WaitableEvent* shutdown_event,
     bool is_helper_nexe)
     : nexe_load_manager_(nexe_load_manager),
       is_helper_nexe_(is_helper_nexe) {
   channel_ = IPC::SyncChannel::Create(
       handle, IPC::Channel::MODE_CLIENT, this,
-      content::RenderThread::Get()->GetIOMessageLoopProxy(), true,
-      shutdown_event);
+      content::RenderThread::Get()->GetIOTaskRunner(), true, shutdown_event);
 }
 
 TrustedPluginChannel::~TrustedPluginChannel() {
 }
 
 bool TrustedPluginChannel::Send(IPC::Message* message) {
   return channel_->Send(message);
 }
 
 bool TrustedPluginChannel::OnMessageReceived(const IPC::Message& msg) {
@@ skipping 31 matching lines @@
                            : "NaCl.LoadStatus.SelLdr.NotInstalledApp";
     HistogramEnumerate(name, load_status, NACL_ERROR_CODE_MAX);
   }
   if (load_status != LOAD_OK) {
     nexe_load_manager_->ReportLoadError(PP_NACL_ERROR_SEL_LDR_START_STATUS,
                                         NaClErrorString(load_status));
   }
 }
 
 }  // namespace nacl