Update animation classes to use OVERRIDE / FINAL when needed

Source/core/animation/AnimatableLengthPoint.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 AnimatableLengthPoint_h
 #define AnimatableLengthPoint_h
 
 #include "core/animation/AnimatableValue.h"
 
 namespace WebCore {
 
-class AnimatableLengthPoint : public AnimatableValue {
+class AnimatableLengthPoint FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableLengthPoint() { }
     static PassRefPtr<AnimatableLengthPoint> create(PassRefPtr<AnimatableValue> x, PassRefPtr<AnimatableValue> y)
     {
         return adoptRef(new AnimatableLengthPoint(x, y));
     }
     const AnimatableValue* x() const { return m_x.get(); }
     const AnimatableValue* y() const { return m_y.get(); }
 
 protected:
@@ skipping 15 matching lines @@
 
 inline const AnimatableLengthPoint* toAnimatableLengthPoint(const AnimatableValue* value)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(value && value->isLengthPoint());
     return static_cast<const AnimatableLengthPoint*>(value);
 }
 
 } // namespace WebCore
 
 #endif // AnimatableLengthPoint_h