Remove use of deprecated MessageLoop methods in device.

device/serial/serial_io_handler.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_io_handler.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
-#include "base/message_loop/message_loop.h"
+#include "base/location.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/permission_broker_client.h"
 #include "dbus/file_descriptor.h"  // nogncheck
 #endif  // defined(OS_CHROMEOS)
 
 namespace device {
@@ skipping 251 matching lines @@
   }
 }
 
 bool SerialIoHandler::ConfigurePort(const serial::ConnectionOptions& options) {
   MergeConnectionOptions(options);
   return ConfigurePortImpl();
 }
 
 void SerialIoHandler::QueueReadCompleted(int bytes_read,
                                          serial::ReceiveError error) {
-  base::MessageLoop::current()->PostTask(
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&SerialIoHandler::ReadCompleted, this, bytes_read, error));
 }
 
 void SerialIoHandler::QueueWriteCompleted(int bytes_written,
                                           serial::SendError error) {
-  base::MessageLoop::current()->PostTask(
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&SerialIoHandler::WriteCompleted, this, bytes_written, error));
 }
 
 }  // namespace device