Update animation classes to use OVERRIDE / FINAL when needed

Source/core/animation/AnimatableLengthSize.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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AnimatableLengthSize_h
 #define AnimatableLengthSize_h
 
 #include "core/animation/AnimatableValue.h"
 
 namespace WebCore {
 
-class AnimatableLengthSize : public AnimatableValue {
+class AnimatableLengthSize FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableLengthSize() { }
     static PassRefPtr<AnimatableLengthSize> create(PassRefPtr<AnimatableValue> width, PassRefPtr<AnimatableValue> height)
     {
         return adoptRef(new AnimatableLengthSize(width, height));
     }
     const AnimatableValue* width() const { return m_width.get(); }
     const AnimatableValue* height() const { return m_height.get(); }
 
 protected:
@@ skipping 11 matching lines @@
 
     RefPtr<AnimatableValue> m_width;
     RefPtr<AnimatableValue> m_height;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableLengthSize, isLengthSize());
 
 } // namespace WebCore
 
 #endif // AnimatableLengthSize_h