Standardize usage of virtual/override/final specifiers.

ash/system/user/accounts_detailed_view.h

 // Copyright 2014 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 ASH_SYSTEM_USER_ACCOUNTS_DETAILED_VIEW_H_
 #define ASH_SYSTEM_USER_ACCOUNTS_DETAILED_VIEW_H_
 
 #include <map>
 #include <string>
 
@@ skipping 13 matching lines @@
 namespace tray {
 
 // This detailed view appears after a click on the primary user's card when the
 // new account managment is enabled.
 class AccountsDetailedView : public TrayDetailsView,
                              public ViewClickListener,
                              public views::ButtonListener,
                              public ash::tray::UserAccountsDelegate::Observer {
  public:
   AccountsDetailedView(TrayUser* owner, user::LoginStatus login_status);
-  virtual ~AccountsDetailedView();
+  ~AccountsDetailedView() override;
 
  private:
   // Overridden from ViewClickListener.
-  virtual void OnViewClicked(views::View* sender) override;
+  void OnViewClicked(views::View* sender) override;
 
   // Overridden from views::ButtonListener.
-  virtual void ButtonPressed(views::Button* sender,
-                             const ui::Event& event) override;
+  void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // Overridden from ash::tray::UserAccountsDelegate::Observer.
-  virtual void AccountListChanged() override;
+  void AccountListChanged() override;
 
   void AddHeader(user::LoginStatus login_status);
   void AddAccountList();
   void AddAddAccountButton();
   void AddFooter();
 
   void UpdateAccountList();
 
   views::View* CreateDeleteButton();
 
   ash::tray::UserAccountsDelegate* delegate_;
   views::View* account_list_;
   views::View* add_account_button_;
   views::View* add_user_button_;
   std::map<views::View*, std::string> delete_button_to_account_id_;
 
   DISALLOW_COPY_AND_ASSIGN(AccountsDetailedView);
 };
 
 }  // namespace tray
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_USER_ACCOUNTS_DETAILED_VIEW_H_