Standardize usage of virtual/override/final specifiers.

chrome/browser/ui/gesture_prefs_observer_factory_aura.cc

 // Copyright (c) 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.
 
 #include "chrome/browser/ui/gesture_prefs_observer_factory_aura.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 45 matching lines @@
     overscroll_prefs.assign(kOverscrollPrefs,
                             kOverscrollPrefs + arraysize(kOverscrollPrefs));
   }
   return overscroll_prefs;
 }
 
 // This class manages gesture configuration preferences.
 class GesturePrefsObserver : public KeyedService {
  public:
   explicit GesturePrefsObserver(PrefService* prefs);
-  virtual ~GesturePrefsObserver();
+  ~GesturePrefsObserver() override;
 
   // KeyedService implementation.
-  virtual void Shutdown() override;
+  void Shutdown() override;
 
  private:
   // Notification callback invoked when browser-side preferences
   // are updated and need to be pushed into ui::GesturePreferences.
   void Update();
 
   // Notification callback invoked when the fling deacceleration
   // gesture preferences are changed from chrome://gesture.
   // Broadcasts the changes all renderers where they are used.
   void Notify();
@@ skipping 166 matching lines @@
   // Use same gesture preferences on incognito windows.
   return chrome::GetBrowserContextRedirectedInIncognito(context);
 }
 
 bool GesturePrefsObserverFactoryAura::ServiceIsNULLWhileTesting() const {
   // Some tests replace the PrefService of the TestingProfile after the
   // GesturePrefsObserver has been created, which makes Shutdown()
   // remove the registrar from a non-existent PrefService.
   return true;
 }