Add service name constant for UI service.

mash/login/login.cc

 // Copyright 2016 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 "mash/login/login.h"
 
 #include <map>
 #include <memory>
 
 #include "ash/public/cpp/shell_window_ids.h"
 #include "base/guid.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "mash/init/public/interfaces/init.mojom.h"
 #include "mash/login/public/interfaces/login.mojom.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/service_manager/public/cpp/interface_factory.h"
 #include "services/service_manager/public/cpp/interface_registry.h"
 #include "services/service_manager/public/cpp/service.h"
 #include "services/service_manager/public/cpp/service_context.h"
 #include "services/tracing/public/cpp/provider.h"
 #include "services/ui/public/cpp/property_type_converters.h"
+#include "services/ui/public/interfaces/constants.mojom.h"
 #include "services/ui/public/interfaces/user_access_manager.mojom.h"
 #include "services/ui/public/interfaces/window_manager.mojom.h"
 #include "ui/views/background.h"
 #include "ui/views/controls/button/md_text_button.h"
 #include "ui/views/mus/aura_init.h"
 #include "ui/views/mus/native_widget_mus.h"
 #include "ui/views/mus/window_manager_connection.h"
 #include "ui/views/widget/widget_delegate.h"
 
 namespace mash {
@@ skipping 114 matching lines @@
 
  private:
   // service_manager::Service:
   void OnStart() override {
     tracing_.Initialize(context()->connector(), context()->identity().name());
 
     aura_init_ = base::MakeUnique<views::AuraInit>(
         context()->connector(), context()->identity(),
         "views_mus_resources.pak");
 
-    context()->connector()->ConnectToInterface(
-        "ui", &user_access_manager_);
+    context()->connector()->ConnectToInterface(ui::mojom::kServiceName,
+                                               &user_access_manager_);
     user_access_manager_->SetActiveUser(context()->identity().user_id());
   }
 
   bool OnConnect(const service_manager::ServiceInfo& remote_info,
                  service_manager::InterfaceRegistry* registry) override {
     registry->AddInterface<mojom::Login>(this);
     return true;
   }
 
   // service_manager::InterfaceFactory<mojom::Login>:
@@ skipping 33 matching lines @@
 }
 
 }  // namespace
 
 service_manager::Service* CreateLogin() {
   return new Login;
 }
 
 }  // namespace login
 }  // namespace main