[device] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

device/serial/serial_connection_factory.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 "device/serial/serial_connection_factory.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "device/serial/serial_connection.h"
 #include "device/serial/serial_io_handler.h"
@@ skipping 43 matching lines @@
   mojo::InterfaceRequest<serial::DataSink> sink_;
   mojo::InterfaceRequest<serial::DataSource> source_;
   mojo::InterfacePtr<serial::DataSourceClient> source_client_;
   scoped_refptr<SerialIoHandler> io_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(ConnectTask);
 };
 
 SerialConnectionFactory::SerialConnectionFactory(
     const IoHandlerFactory& io_handler_factory,
-    scoped_refptr<base::MessageLoopProxy> connect_message_loop)
+    scoped_refptr<base::SingleThreadTaskRunner> connect_task_runner)
     : io_handler_factory_(io_handler_factory),
-      connect_message_loop_(connect_message_loop) {
+      connect_task_runner_(connect_task_runner) {
 }
 
 void SerialConnectionFactory::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) {
   scoped_refptr<ConnectTask> task(
@@ skipping 20 matching lines @@
       sink_(sink.Pass()),
       source_(source.Pass()),
       source_client_(source_client.Pass()) {
   if (!options_) {
     options_ = serial::ConnectionOptions::New();
   }
   FillDefaultConnectionOptions(options_.get());
 }
 
 void SerialConnectionFactory::ConnectTask::Run() {
-  factory_->connect_message_loop_->PostTask(
+  factory_->connect_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&SerialConnectionFactory::ConnectTask::Connect, this));
 }
 
 SerialConnectionFactory::ConnectTask::~ConnectTask() {
 }
 
 void SerialConnectionFactory::ConnectTask::Connect() {
   io_handler_ = factory_->io_handler_factory_.Run();
   io_handler_->Open(
       path_, *options_,
       base::Bind(&SerialConnectionFactory::ConnectTask::OnConnected, this));
 }
 
 void SerialConnectionFactory::ConnectTask::OnConnected(bool success) {
   DCHECK(io_handler_.get());
   if (!success) {
     return;
   }
 
   mojo::BindToRequest(
       new SerialConnection(io_handler_, sink_.Pass(), source_.Pass(),
                            source_client_.Pass()),
       &connection_request_);
 }
 
 }  // namespace device