Convert //mash to define service names in mojom

chrome/browser/chromeos/settings/shutdown_policy_forwarder.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 "chrome/browser/chromeos/settings/shutdown_policy_forwarder.h"
 
 #include "ash/public/interfaces/shutdown.mojom.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/ui/ash/ash_util.h"
 #include "content/public/common/service_manager_connection.h"
+#include "content/public/common/service_names.mojom.h"
 #include "services/service_manager/public/cpp/connector.h"
 
 namespace chromeos {
 
 ShutdownPolicyForwarder::ShutdownPolicyForwarder()
     : shutdown_policy_handler_(CrosSettings::Get(), this) {
   // Request the initial setting.
   shutdown_policy_handler_.NotifyDelegateWithShutdownPolicy();
 }
 
 ShutdownPolicyForwarder::~ShutdownPolicyForwarder() {}
 
 void ShutdownPolicyForwarder::OnShutdownPolicyChanged(bool reboot_on_shutdown) {
   service_manager::Connector* connector =
       content::ServiceManagerConnection::GetForProcess()->GetConnector();
 
   // Shutdown policy changes rarely so don't bother caching the connection.
   ash::mojom::ShutdownControllerPtr shutdown_controller;
 
   // Under mash the ShutdownController interface is in the ash process. In
   // classic ash the browser provides it to itself.
-  if (chrome::IsRunningInMash())
+  if (chrome::IsRunningInMash()) {
     connector->ConnectToInterface("ash", &shutdown_controller);
-  else
-    connector->ConnectToInterface("content_browser", &shutdown_controller);
+  } else {
+    connector->ConnectToInterface(content::mojom::kBrowserServiceName,
+                                  &shutdown_controller);
+  }
 
   // Forward the setting to ash.
   shutdown_controller->SetRebootOnShutdown(reboot_on_shutdown);
 }
 
 }  // namespace chromeos