Update animation classes to use OVERRIDE / FINAL when needed

Source/core/animation/AnimatableLengthBox.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 AnimatableLengthBox_h
 #define AnimatableLengthBox_h
 
 #include "core/animation/AnimatableValue.h"
 
 namespace WebCore {
 
-class AnimatableLengthBox : public AnimatableValue {
+class AnimatableLengthBox FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableLengthBox() { }
     static PassRefPtr<AnimatableLengthBox> create(PassRefPtr<AnimatableValue> left, PassRefPtr<AnimatableValue> right, PassRefPtr<AnimatableValue> top, PassRefPtr<AnimatableValue> bottom)
     {
         return adoptRef(new AnimatableLengthBox(left, right, top, bottom));
     }
     const AnimatableValue* left() const { return m_left.get(); }
     const AnimatableValue* right() const { return m_right.get(); }
     const AnimatableValue* top() const { return m_top.get(); }
     const AnimatableValue* bottom() const { return m_bottom.get(); }
@@ skipping 17 matching lines @@
     RefPtr<AnimatableValue> m_right;
     RefPtr<AnimatableValue> m_top;
     RefPtr<AnimatableValue> m_bottom;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableLengthBox, isLengthBox());
 
 } // namespace WebCore
 
 #endif // AnimatableLengthBox_h