Standardize usage of virtual/override/final in ui/

ui/gfx/animation/animation.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 UI_GFX_ANIMATION_ANIMATION_H_
 #define UI_GFX_ANIMATION_ANIMATION_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
@@ skipping 10 matching lines @@
 
 // Base class used in implementing animations. You only need use this class if
 // you're implementing a new animation type, otherwise you'll likely want one of
 // LinearAnimation, SlideAnimation, ThrobAnimation or MultiAnimation.
 //
 // To subclass override Step, which is invoked as the animation progresses and
 // GetCurrentValue() to return the value appropriate to the animation.
 class GFX_EXPORT Animation : public AnimationContainerElement {
  public:
   explicit Animation(base::TimeDelta timer_interval);
-  virtual ~Animation();
+  ~Animation() override;
 
   // Starts the animation. Does nothing if the animation is already running.
   void Start();
 
   // Stops the animation. Does nothing if the animation is not running.
   void Stop();
 
   // Gets the value for the current state, according to the animation
   // curve in use.
   virtual double GetCurrentValue() const = 0;
@@ skipping 32 matching lines @@
   // Invoked from stop to determine if cancel should be invoked. If this returns
   // true the delegate is notified the animation was canceled, otherwise the
   // delegate is notified the animation stopped.
   virtual bool ShouldSendCanceledFromStop();
 
   AnimationContainer* container() { return container_.get(); }
   base::TimeTicks start_time() const { return start_time_; }
   AnimationDelegate* delegate() { return delegate_; }
 
   // AnimationContainer::Element overrides
-  virtual void SetStartTime(base::TimeTicks start_time) override;
+  void SetStartTime(base::TimeTicks start_time) override;
   virtual void Step(base::TimeTicks time_now) = 0;
-  virtual base::TimeDelta GetTimerInterval() const override;
+  base::TimeDelta GetTimerInterval() const override;
 
  private:
   // Interval for the animation.
   const base::TimeDelta timer_interval_;
 
   // If true we're running.
   bool is_animating_;
 
   // Our delegate; may be null.
   AnimationDelegate* delegate_;
 
   // Container we're in. If non-null we're animating.
   scoped_refptr<AnimationContainer> container_;
 
   // Time we started at.
   base::TimeTicks start_time_;
 
   DISALLOW_COPY_AND_ASSIGN(Animation);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_ANIMATION_ANIMATION_H_