[device] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

device/serial/serial_io_handler_win.h

Index: device/serial/serial_io_handler_win.h
diff --git a/device/serial/serial_io_handler_win.h b/device/serial/serial_io_handler_win.h
index 838fdc87a776fbb4d60eab64a1b96121daf13cfd..d2c14212d19ee6db36f8419710638d6e8433d181 100644
--- a/device/serial/serial_io_handler_win.h
+++ b/device/serial/serial_io_handler_win.h
@@ -7,6 +7,8 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
 #include "device/serial/serial_io_handler.h"
 
 namespace device {
@@ -31,8 +33,8 @@ class SerialIoHandlerWin : public SerialIoHandler,
   friend class SerialIoHandler;
 
   explicit SerialIoHandlerWin(
-      scoped_refptr<base::MessageLoopProxy> file_thread_message_loop,
-      scoped_refptr<base::MessageLoopProxy> ui_thread_message_loop);
+      scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> ui_thread_task_runner);
   ~SerialIoHandlerWin() override;
 
   // base::MessageLoopForIO::IOHandler implementation.