[device] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

device/serial/serial_service_impl.h

Index: device/serial/serial_service_impl.h
diff --git a/device/serial/serial_service_impl.h b/device/serial/serial_service_impl.h
index b6387a84582710e4904dd8f0e7ea5de073b6b0b5..1680c6e1d63743015fcf3860541f23a99db6ae13 100644
--- a/device/serial/serial_service_impl.h
+++ b/device/serial/serial_service_impl.h
@@ -7,6 +7,8 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
 #include "device/serial/data_stream.mojom.h"
 #include "device/serial/serial.mojom.h"
 #include "device/serial/serial_connection_factory.h"
@@ -23,13 +25,14 @@ class SerialServiceImpl : public mojo::InterfaceImpl<serial::SerialService> {
                     scoped_ptr<SerialDeviceEnumerator> device_enumerator);
   ~SerialServiceImpl() override;
 
-  static void Create(scoped_refptr<base::MessageLoopProxy> io_message_loop,
-                     scoped_refptr<base::MessageLoopProxy> ui_message_loop,
-                     mojo::InterfaceRequest<serial::SerialService> request);
+  static void Create(
+      scoped_refptr<base::SingleThreadTaskRunner> io_message_loop,
+      scoped_refptr<base::SingleThreadTaskRunner> ui_message_loop,
+      mojo::InterfaceRequest<serial::SerialService> request);
   static void CreateOnMessageLoop(
-      scoped_refptr<base::MessageLoopProxy> message_loop,
-      scoped_refptr<base::MessageLoopProxy> io_message_loop,
-      scoped_refptr<base::MessageLoopProxy> ui_message_loop,
+      scoped_refptr<base::SingleThreadTaskRunner> message_loop,
+      scoped_refptr<base::SingleThreadTaskRunner> io_message_loop,
+      scoped_refptr<base::SingleThreadTaskRunner> ui_message_loop,
       mojo::InterfaceRequest<serial::SerialService> request);
 
   // mojo::InterfaceImpl<SerialService> overrides.