Update animation classes to use OVERRIDE / FINAL when needed

Source/core/animation/AnimatableShadow.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #ifndef AnimatableShadow_h
 #define AnimatableShadow_h
 
 #include "core/animation/AnimatableValue.h"
 #include "core/rendering/style/ShadowList.h"
 
 namespace WebCore {
 
-class AnimatableShadow : public AnimatableValue {
+class AnimatableShadow FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableShadow() { }
     static PassRefPtr<AnimatableShadow> create(PassRefPtr<ShadowList> shadowList)
     {
         return adoptRef(new AnimatableShadow(shadowList));
     }
     ShadowList* shadowList() const { return m_shadowList.get(); }
 
 protected:
     virtual PassRefPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const OVERRIDE;
     virtual PassRefPtr<AnimatableValue> addWith(const AnimatableValue*) const OVERRIDE;
 
 private:
     explicit AnimatableShadow(PassRefPtr<ShadowList> shadowList)
         : m_shadowList(shadowList)
     {
     }
     virtual AnimatableType type() const OVERRIDE { return TypeShadow; }
     virtual bool equalTo(const AnimatableValue*) const OVERRIDE;
 
     const RefPtr<ShadowList> m_shadowList;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableShadow, isShadow());
 
 } // namespace WebCore
 
 #endif // AnimatableShadow_h