[device] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

device/serial/serial_service_impl.cc

Index: device/serial/serial_service_impl.cc
diff --git a/device/serial/serial_service_impl.cc b/device/serial/serial_service_impl.cc
index 5fc886df2eca241e338333ee682e8ae420656a41..6ba12e76612347aa0ce75218ea477c6413901f08 100644
--- a/device/serial/serial_service_impl.cc
+++ b/device/serial/serial_service_impl.cc
@@ -27,22 +27,22 @@ SerialServiceImpl::~SerialServiceImpl() {
 
 // static
 void SerialServiceImpl::Create(
-    scoped_refptr<base::MessageLoopProxy> io_message_loop,
-    scoped_refptr<base::MessageLoopProxy> ui_message_loop,
+    scoped_refptr<base::SingleThreadTaskRunner> io_message_loop,
+    scoped_refptr<base::SingleThreadTaskRunner> ui_message_loop,
     mojo::InterfaceRequest<serial::SerialService> request) {
-  mojo::BindToRequest(new SerialServiceImpl(new SerialConnectionFactory(
-                          base::Bind(SerialIoHandler::Create,
-                                     base::MessageLoopProxy::current(),
-                                     ui_message_loop),
-                          io_message_loop)),
-                      &request);
+  mojo::BindToRequest(
+      new SerialServiceImpl(new SerialConnectionFactory(
+          base::Bind(SerialIoHandler::Create,
+                     base::ThreadTaskRunnerHandle::Get(), ui_message_loop),
+          io_message_loop)),
+      &request);
 }
 
 // static
 void SerialServiceImpl::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) {
   message_loop->PostTask(FROM_HERE,
                          base::Bind(&SerialServiceImpl::Create,