Update {virtual,override,final} to follow C++11 style in chrome/browser/chromeos/login/ui.

chrome/browser/chromeos/login/ui/lock_window_aura.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 CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOCK_WINDOW_AURA_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOCK_WINDOW_AURA_H_
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/chromeos/login/ui/lock_window.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 
 namespace chromeos {
 
 class LockWindowAura : public views::Widget,
                        public views::WidgetDelegate,
                        public LockWindow {
  public:
   // LockWindow implementation:
-  virtual void Grab() override;
-  virtual views::Widget* GetWidget() override;
+  void Grab() override;
+  views::Widget* GetWidget() override;
 
   // views::WidgetDelegate implementation:
-  virtual views::View* GetInitiallyFocusedView() override;
-  virtual const views::Widget* GetWidget() const override;
+  views::View* GetInitiallyFocusedView() override;
+  const views::Widget* GetWidget() const override;
 
  private:
   friend class LockWindow;
 
   LockWindowAura();
-  virtual ~LockWindowAura();
+  ~LockWindowAura() override;
 
   // Initialize the Aura lock window.
   void Init();
 
 #if defined(USE_ATHENA)
   scoped_ptr<aura::Window> lock_screen_container_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(LockWindowAura);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOCK_WINDOW_AURA_H_