Update animation classes to use OVERRIDE / FINAL when needed

Source/core/animation/AnimatableLengthBoxAndBool.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 AnimatableLengthBoxAndBool_h
 #define AnimatableLengthBoxAndBool_h
 
 #include "core/animation/AnimatableValue.h"
 
 namespace WebCore {
 
-class AnimatableLengthBoxAndBool : public AnimatableValue {
+class AnimatableLengthBoxAndBool FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableLengthBoxAndBool() { }
     static PassRefPtr<AnimatableLengthBoxAndBool> create(PassRefPtr<AnimatableValue> box, bool flag)
     {
         return adoptRef(new AnimatableLengthBoxAndBool(box, flag));
     }
     const AnimatableValue* box() const { return m_box.get(); }
     bool flag() const { return m_flag; }
 
 protected:
@@ skipping 12 matching lines @@
 
     RefPtr<AnimatableValue> m_box;
     bool m_flag;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableLengthBoxAndBool, isLengthBoxAndBool());
 
 } // namespace WebCore
 
 #endif // AnimatableLengthBoxAndBool_h