Update animation classes to use OVERRIDE / FINAL when needed

Source/core/animation/AnimatableDouble.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 18 matching lines @@
  */
 
 #ifndef AnimatableDouble_h
 #define AnimatableDouble_h
 
 #include "core/animation/AnimatableValue.h"
 #include "core/css/CSSValue.h"
 
 namespace WebCore {
 
-class AnimatableDouble : public AnimatableValue {
+class AnimatableDouble FINAL : public AnimatableValue {
 public:
     virtual ~AnimatableDouble() { }
 
     enum Constraint {
         Unconstrained,
         InterpolationIsNonContinuousWithZero,
     };
 
     static PassRefPtr<AnimatableDouble> create(double number, Constraint constraint = Unconstrained)
     {
@@ skipping 19 matching lines @@
 
     double m_number;
     Constraint m_constraint;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableDouble, isDouble());
 
 } // namespace WebCore
 
 #endif // AnimatableDouble_h