[device] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

device/serial/serial_service_unittest.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 "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "device/serial/serial.mojom.h"
 #include "device/serial/serial_service_impl.h"
 #include "device/serial/test_serial_io_handler.h"
@@ skipping 61 matching lines @@
 
   void RunConnectTest(const std::string& path, bool expecting_success) {
     if (!io_handler_.get())
       io_handler_ = new TestSerialIoHandler;
     mojo::InterfacePtr<serial::SerialService> service;
     mojo::BindToProxy(
         new SerialServiceImpl(
             new SerialConnectionFactory(
                 base::Bind(&SerialServiceTest::ReturnIoHandler,
                            base::Unretained(this)),
-                base::MessageLoopProxy::current()),
+                base::ThreadTaskRunnerHandle::Get()),
             scoped_ptr<SerialDeviceEnumerator>(new FakeSerialDeviceEnumerator)),
         &service);
     mojo::InterfacePtr<serial::Connection> connection;
     mojo::InterfacePtr<serial::DataSink> sink;
     mojo::InterfacePtr<serial::DataSource> source;
     mojo::InterfacePtr<serial::DataSourceClient> source_client;
     mojo::GetProxy(&source_client);
     service->Connect(path, serial::ConnectionOptions::New(),
                      mojo::GetProxy(&connection), mojo::GetProxy(&sink),
                      mojo::GetProxy(&source), source_client.Pass());
@@ skipping 40 matching lines @@
 TEST_F(SerialServiceTest, ConnectInvalidPath) {
   RunConnectTest("invalid_path", false);
 }
 
 TEST_F(SerialServiceTest, ConnectOpenFailed) {
   io_handler_ = new FailToOpenIoHandler;
   RunConnectTest("device", false);
 }
 
 }  // namespace device