[device] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

device/serial/serial_connection_factory.h

 // 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.
 
 #ifndef DEVICE_SERIAL_SERIAL_CONNECTION_FACTORY_H_
 #define DEVICE_SERIAL_SERIAL_CONNECTION_FACTORY_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
 #include "device/serial/data_stream.mojom.h"
 #include "device/serial/serial.mojom.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/interface_request.h"
 
 namespace device {
 
 class SerialIoHandler;
 
 class SerialConnectionFactory
     : public base::RefCountedThreadSafe<SerialConnectionFactory> {
  public:
   typedef base::Callback<scoped_refptr<SerialIoHandler>()> IoHandlerFactory;
 
   SerialConnectionFactory(
       const IoHandlerFactory& io_handler_factory,
-      scoped_refptr<base::MessageLoopProxy> connect_message_loop);
+      scoped_refptr<base::SingleThreadTaskRunner> connect_task_runner);
 
   void CreateConnection(
       const std::string& path,
       serial::ConnectionOptionsPtr options,
       mojo::InterfaceRequest<serial::Connection> connection_request,
       mojo::InterfaceRequest<serial::DataSink> sink,
       mojo::InterfaceRequest<serial::DataSource> source,
       mojo::InterfacePtr<serial::DataSourceClient> source_client);
 
  private:
   friend class base::RefCountedThreadSafe<SerialConnectionFactory>;
   class ConnectTask;
 
   virtual ~SerialConnectionFactory();
 
   const IoHandlerFactory io_handler_factory_;
-  scoped_refptr<base::MessageLoopProxy> connect_message_loop_;
+  scoped_refptr<base::SingleThreadTaskRunner> connect_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(SerialConnectionFactory);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_SERIAL_SERIAL_CONNECTION_FACTORY_H_