Cleanup: Remove VersionUpdater::RelaunchBrowser interface method.

chrome/browser/ui/webui/help/version_updater_win.h

 // Copyright 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.
 
 // Windows implementation of version update functionality, used by the WebUI
 // About/Help page.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_HELP_VERSION_UPDATER_WIN_H_
 #define CHROME_BROWSER_UI_WEBUI_HELP_VERSION_UPDATER_WIN_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/google/google_update_win.h"
 #include "chrome/browser/ui/webui/help/version_updater.h"
 
 class VersionUpdaterWin : public VersionUpdater,
                           public UpdateCheckDelegate {
  public:
   // |owner_widget| is the parent widget hosting the update check UI. Any UI
   // needed to install an update (e.g., a UAC prompt for a system-level install)
   // will be parented to this widget. |owner_widget| may be given a value of
   // nullptr in which case the UAC prompt will be parented to the desktop.
   explicit VersionUpdaterWin(gfx::AcceleratedWidget owner_widget);
   ~VersionUpdaterWin() override;
 
   // VersionUpdater:
   void CheckForUpdate(const StatusCallback& callback,
                       const PromoteCallback&) override;
-  void RelaunchBrowser() const override;
 
   // UpdateCheckDelegate:
   void OnUpdateCheckComplete(const base::string16& new_version) override;
   void OnUpgradeProgress(int progress,
                          const base::string16& new_version) override;
   void OnUpgradeComplete(const base::string16& new_version) override;
   void OnError(GoogleUpdateErrorCode error_code,
                const base::string16& html_error_message,
                const base::string16& new_version) override;
 
@@ skipping 10 matching lines @@
   // Callback used to communicate update status to the client.
   StatusCallback callback_;
 
   // Used for callbacks.
   base::WeakPtrFactory<VersionUpdaterWin> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VersionUpdaterWin);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_HELP_VERSION_UPDATER_WIN_H_