Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/app_list/search/webstore/webstore_installer.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_SEARCH_WEBSTORE_WEBSTORE_INSTALLER_H_
 #define CHROME_BROWSER_UI_APP_LIST_SEARCH_WEBSTORE_WEBSTORE_INSTALLER_H_
 
 #include "chrome/browser/extensions/webstore_install_with_prompt.h"
 
 class Profile;
 
 namespace app_list {
 
 // WebstoreInstaller handles install for web store search results.
 class WebstoreInstaller : public extensions::WebstoreInstallWithPrompt {
  public:
   typedef WebstoreStandaloneInstaller::Callback Callback;
 
   WebstoreInstaller(const std::string& webstore_item_id,
                     Profile* profile,
                     gfx::NativeWindow parent_window,
                     const Callback& callback);
 
  private:
   friend class base::RefCountedThreadSafe<WebstoreInstaller>;
-  virtual ~WebstoreInstaller();
+  ~WebstoreInstaller() override;
 
   DISALLOW_COPY_AND_ASSIGN(WebstoreInstaller);
 };
 
 }  // namespace app_list
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_SEARCH_WEBSTORE_WEBSTORE_INSTALLER_H_