Add service name constant for UI service.

ui/views/mus/input_method_mus.cc

 // Copyright (c) 2015 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 "ui/views/mus/input_method_mus.h"
 
 #include <utility>
 
 #include "services/ui/public/cpp/window.h"
+#include "services/ui/public/interfaces/constants.mojom.h"
 #include "services/ui/public/interfaces/ime.mojom.h"
 #include "ui/base/ime/text_input_client.h"
 #include "ui/events/event.h"
 #include "ui/platform_window/mojo/ime_type_converters.h"
 #include "ui/platform_window/mojo/text_input_state.mojom.h"
 #include "ui/views/mus/text_input_client_impl.h"
 
 using ui::mojom::EventResult;
 
 namespace views {
 
 ////////////////////////////////////////////////////////////////////////////////
 // InputMethodMus, public:
 
 InputMethodMus::InputMethodMus(ui::internal::InputMethodDelegate* delegate,
                                ui::Window* window)
     : window_(window) {
   SetDelegate(delegate);
 }
 
 InputMethodMus::~InputMethodMus() {}
 
 void InputMethodMus::Init(service_manager::Connector* connector) {
-  connector->ConnectToInterface("ui", &ime_server_);
+  connector->ConnectToInterface(ui::mojom::kServiceName, &ime_server_);
 }
 
 void InputMethodMus::DispatchKeyEvent(
     ui::KeyEvent* event,
     std::unique_ptr<base::Callback<void(EventResult)>> ack_callback) {
   DCHECK(event->type() == ui::ET_KEY_PRESSED ||
          event->type() == ui::ET_KEY_RELEASED);
 
   // If no text input client, do nothing.
   if (!GetTextInputClient()) {
@@ skipping 110 matching lines @@
     event_result = EventResult::HANDLED;
   }
   // |ack_callback| can be null if the standard form of DispatchKeyEvent() is
   // called instead of the version which provides a callback. In mus+ash we
   // use the version with callback, but some unittests use the standard form.
   if (ack_callback)
     ack_callback->Run(event_result);
 }
 
 }  // namespace views