Convert //mash to define service names in mojom

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/constants.mojom.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"
@@ skipping 112 matching lines @@
 class Login : public service_manager::Service,
               public service_manager::InterfaceFactory<mojom::Login>,
               public mojom::Login {
  public:
    Login() {}
   ~Login() override {}
 
   void LoginAs(const std::string& user_id) {
     user_access_manager_->SetActiveUser(user_id);
     mash::init::mojom::InitPtr init;
-    context()->connector()->ConnectToInterface("mash_init", &init);
+    context()->connector()->ConnectToInterface(init::mojom::kServiceName,
+                                               &init);
     init->StartService("mash_session", user_id);
   }
 
  private:
   // service_manager::Service:
   void OnStart() override {
     tracing_.Initialize(context()->connector(), context()->identity().name());
 
     aura_init_ = base::MakeUnique<views::AuraInit>(
         context()->connector(), context()->identity(),
@@ skipping 47 matching lines @@
 }
 
 }  // namespace
 
 service_manager::Service* CreateLogin() {
   return new Login;
 }
 
 }  // namespace login
 }  // namespace main