Update animation classes to use OVERRIDE / FINAL when needed

Source/core/animation/KeyframeEffectModel.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 56 matching lines @@
     PassRefPtr<Keyframe> cloneWithOffset(double offset) const;
 private:
     Keyframe();
     Keyframe(const Keyframe&);
     double m_offset;
     AnimationEffect::CompositeOperation m_composite;
     typedef HashMap<CSSPropertyID, RefPtr<AnimatableValue> > PropertyValueMap;
     PropertyValueMap m_propertyValues;
 };
 
-class KeyframeEffectModel : public AnimationEffect {
+class KeyframeEffectModel FINAL : public AnimationEffect {
 public:
     class PropertySpecificKeyframe;
     typedef Vector<RefPtr<Keyframe> > KeyframeVector;
     typedef Vector<OwnPtr<PropertySpecificKeyframe> > PropertySpecificKeyframeVector;
     // FIXME: Implement accumulation.
     static PassRefPtr<KeyframeEffectModel> create(const KeyframeVector& keyframes)
     {
         return adoptRef(new KeyframeEffectModel(keyframes));
     }
 
@@ skipping 58 matching lines @@
     // property-specific lists.
     typedef HashMap<CSSPropertyID, OwnPtr<PropertySpecificKeyframeGroup> > KeyframeGroupMap;
     mutable OwnPtr<KeyframeGroupMap> m_keyframeGroups;
 };
 
 DEFINE_TYPE_CASTS(KeyframeEffectModel, AnimationEffect, value, value->isKeyframeEffectModel(), value.isKeyframeEffectModel());
 
 } // namespace WebCore
 
 #endif // KeyframeEffectModel_h