Make ChannelMojoHost::ChannelDelegate a RefContedThreadSafe

ipc/ipc_test_base.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 "build/build_config.h"
 
 #include "ipc/ipc_test_base.h"
 
 #include "base/command_line.h"
 #include "base/process/kill.h"
@@ skipping 135 matching lines @@
   bool rv = client_process_.WaitForExitWithTimeout(
       base::TimeDelta::FromSeconds(5), &exit_code);
   client_process_.Close();
   return rv;
 }
 
 IPC::ChannelHandle IPCTestBase::GetTestChannelHandle() {
   return GetChannelName(test_client_name_);
 }
 
-scoped_refptr<base::TaskRunner> IPCTestBase::task_runner() {
+scoped_refptr<base::SequencedTaskRunner> IPCTestBase::task_runner() {
   return message_loop_->message_loop_proxy();
 }
 
 scoped_ptr<IPC::ChannelFactory> IPCTestBase::CreateChannelFactory(
     const IPC::ChannelHandle& handle,
     base::TaskRunner* runner) {
   return IPC::ChannelFactory::Create(handle, IPC::Channel::MODE_SERVER);
 }