Update animation classes to use OVERRIDE / FINAL when needed

Source/core/animation/AnimatableColor.h

Index: Source/core/animation/AnimatableColor.h
diff --git a/Source/core/animation/AnimatableColor.h b/Source/core/animation/AnimatableColor.h
index 57c8fd3cfebb341e6b457994fa38101f69eb703c..e5fc028828137b7af68a269920c6e7e7e92a996b 100644
--- a/Source/core/animation/AnimatableColor.h
+++ b/Source/core/animation/AnimatableColor.h
@@ -56,7 +56,7 @@ private:
 // property. Currently it is used for all properties, even those which do not
 // support a separate 'visited link' color (eg SVG properties). This is correct
 // but inefficient.
-class AnimatableColor : public AnimatableValue {
+class AnimatableColor FINAL : public AnimatableValue {
 public:
     static PassRefPtr<AnimatableColor> create(const AnimatableColorImpl&, const AnimatableColorImpl& visitedLinkColor);
     Color color() const { return m_color.toColor(); }