[device] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

device/serial/serial_io_handler_win.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 <windows.h>
 
 #include "device/serial/serial_io_handler_win.h"
 
 namespace device {
 
@@ skipping 116 matching lines @@
     case ONESTOPBIT:
     default:
       return serial::STOP_BITS_ONE;
   }
 }
 
 }  // namespace
 
 // static
 scoped_refptr<SerialIoHandler> SerialIoHandler::Create(
-    scoped_refptr<base::MessageLoopProxy> file_thread_message_loop,
-    scoped_refptr<base::MessageLoopProxy> ui_thread_message_loop) {
-  return new SerialIoHandlerWin(file_thread_message_loop,
-                                ui_thread_message_loop);
+    scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> ui_thread_task_runner) {
+  return new SerialIoHandlerWin(file_thread_task_runner, ui_thread_task_runner);
 }
 
 bool SerialIoHandlerWin::PostOpen() {
   DCHECK(!comm_context_);
   DCHECK(!read_context_);
   DCHECK(!write_context_);
 
   base::MessageLoopForIO::current()->RegisterIOHandler(file().GetPlatformFile(),
                                                        this);
 
@@ skipping 117 matching lines @@
   }
 
   if (!SetCommState(file().GetPlatformFile(), &config)) {
     VPLOG(1) << "Failed to set serial port info";
     return false;
   }
   return true;
 }
 
 SerialIoHandlerWin::SerialIoHandlerWin(
-    scoped_refptr<base::MessageLoopProxy> file_thread_message_loop,
-    scoped_refptr<base::MessageLoopProxy> ui_thread_message_loop)
-    : SerialIoHandler(file_thread_message_loop, ui_thread_message_loop),
+    scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> ui_thread_task_runner)
+    : SerialIoHandler(file_thread_task_runner, ui_thread_task_runner),
       event_mask_(0),
       is_comm_pending_(false) {
 }
 
 SerialIoHandlerWin::~SerialIoHandlerWin() {
 }
 
 void SerialIoHandlerWin::OnIOCompleted(
     base::MessageLoopForIO::IOContext* context,
     DWORD bytes_transferred,
@@ skipping 102 matching lines @@
 std::string SerialIoHandler::MaybeFixUpPortName(const std::string& port_name) {
   // For COM numbers less than 9, CreateFile is called with a string such as
   // "COM1". For numbers greater than 9, a prefix of "\\\\.\\" must be added.
   if (port_name.length() > std::string("COM9").length())
     return std::string("\\\\.\\").append(port_name);
 
   return port_name;
 }
 
 }  // namespace device