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

chrome/browser/extensions/theme_installed_infobar_delegate.h

 // Copyright (c) 2011 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_EXTENSIONS_THEME_INSTALLED_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_EXTENSIONS_THEME_INSTALLED_INFOBAR_DELEGATE_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 21 matching lines @@
                      Profile* profile,
                      const std::string& previous_theme_id,
                      bool previous_using_system_theme);
 
  private:
   ThemeInstalledInfoBarDelegate(ExtensionService* extension_service,
                                 ThemeService* theme_service,
                                 const extensions::Extension* new_theme,
                                 const std::string& previous_theme_id,
                                 bool previous_using_system_theme);
-  virtual ~ThemeInstalledInfoBarDelegate();
+  ~ThemeInstalledInfoBarDelegate() override;
 
   // ConfirmInfoBarDelegate:
-  virtual int GetIconID() const override;
-  virtual Type GetInfoBarType() const override;
-  virtual ThemeInstalledInfoBarDelegate*
-      AsThemePreviewInfobarDelegate() override;
-  virtual base::string16 GetMessageText() const override;
-  virtual int GetButtons() const override;
-  virtual base::string16 GetButtonLabel(InfoBarButton button) const override;
-  virtual bool Cancel() override;
+  int GetIconID() const override;
+  Type GetInfoBarType() const override;
+  ThemeInstalledInfoBarDelegate* AsThemePreviewInfobarDelegate() override;
+  base::string16 GetMessageText() const override;
+  int GetButtons() const override;
+  base::string16 GetButtonLabel(InfoBarButton button) const override;
+  bool Cancel() override;
 
   // content::NotificationObserver:
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) override;
+  void Observe(int type,
+               const content::NotificationSource& source,
+               const content::NotificationDetails& details) override;
 
   ExtensionService* extension_service_;
   ThemeService* theme_service_;
 
   // Name of theme that's just been installed.
   std::string name_;
 
   // ID of theme that's just been installed.
   std::string theme_id_;
 
   // Used to undo theme install.
   std::string previous_theme_id_;
   bool previous_using_system_theme_;
 
   // Registers and unregisters us for notifications.
   content::NotificationRegistrar registrar_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_THEME_INSTALLED_INFOBAR_DELEGATE_H_