Remove all remaining traces of MessageLoopProxy.

components/nacl/renderer/manifest_service_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/manifest_service_channel.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 14 matching lines @@
     const IPC::ChannelHandle& handle,
     const base::Callback<void(int32_t)>& connected_callback,
     std::unique_ptr<Delegate> delegate,
     base::WaitableEvent* waitable_event)
     : connected_callback_(connected_callback),
       delegate_(std::move(delegate)),
       channel_(IPC::SyncChannel::Create(
           handle,
           IPC::Channel::MODE_CLIENT,
           this,
-          content::RenderThread::Get()->GetIOMessageLoopProxy(),
+          content::RenderThread::Get()->GetIOTaskRunner(),
           true,
           waitable_event)),
       peer_pid_(base::kNullProcessId),
       weak_ptr_factory_(this) {}
 
 ManifestServiceChannel::~ManifestServiceChannel() {
   if (!connected_callback_.is_null())
     base::ResetAndReturn(&connected_callback_).Run(PP_ERROR_FAILED);
 }
 
@@ skipping 45 matching lines @@
     IPC::PlatformFileForTransit file_for_transit =
         IPC::TakePlatformFileForTransit(std::move(file));
     handle.set_file_handle(file_for_transit, PP_FILEOPENFLAG_READ, 0);
   }
   PpapiHostMsg_OpenResource::WriteReplyParams(reply, token_lo, token_hi,
                                               handle);
   Send(reply);
 }
 
 }  // namespace nacl