Cleanup: Remove VersionUpdater::RelaunchBrowser interface method.

chrome/browser/ui/webui/help/version_updater_chromeos.cc

 // Copyright (c) 2012 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/ui/webui/help/version_updater_chromeos.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 138 matching lines @@
   check_for_update_when_idle_ = false;
 
   // Make sure that libcros is loaded and OOBE is complete.
   if (!WizardController::default_controller() ||
       chromeos::StartupUtils::IsDeviceRegistered()) {
     update_engine_client->RequestUpdateCheck(base::Bind(
         &VersionUpdaterCros::OnUpdateCheck, weak_ptr_factory_.GetWeakPtr()));
   }
 }
 
-void VersionUpdaterCros::RelaunchBrowser() const {
-  DBusThreadManager::Get()->GetPowerManagerClient()->RequestRestart();
-}
-
 void VersionUpdaterCros::SetChannel(const std::string& channel,
                                     bool is_powerwash_allowed) {
   OwnerSettingsServiceChromeOS* service =
       context_
           ? OwnerSettingsServiceChromeOSFactory::GetInstance()
                 ->GetForBrowserContext(context_)
           : nullptr;
   // For local owner set the field in the policy blob.
   if (service)
     service->SetString(chromeos::kReleaseChannel, channel);
@@ skipping 80 matching lines @@
   }
 }
 
 void VersionUpdaterCros::OnUpdateCheck(
     UpdateEngineClient::UpdateCheckResult result) {
   // If version updating is not implemented, this binary is the most up-to-date
   // possible with respect to automatic updating.
   if (result == UpdateEngineClient::UPDATE_RESULT_NOTIMPLEMENTED)
     callback_.Run(UPDATED, 0, base::string16());
 }