Fix virtual/override/final usage in Source/core/{animation,css,style}/.

Source/core/animation/SVGInterpolation.h

Index: Source/core/animation/SVGInterpolation.h
diff --git a/Source/core/animation/SVGInterpolation.h b/Source/core/animation/SVGInterpolation.h
index 8e616e01270624ddafd1586da48f7dd098a71c9a..d58766f826ad4f766e34ceeacbf988ccf4ad09c5 100644
--- a/Source/core/animation/SVGInterpolation.h
+++ b/Source/core/animation/SVGInterpolation.h
@@ -13,13 +13,13 @@ namespace blink {
 
 class SVGInterpolation : public Interpolation {
 public:
-    virtual bool isSVGInterpolation() const override final { return true; }
+    bool isSVGInterpolation() const final { return true; }
 
     SVGAnimatedPropertyBase* attribute() const { return m_attribute.get(); }
 
     const QualifiedName& attributeName() const { return m_attribute->attributeName(); }
 
-    virtual PropertyHandle property() const override final
+    PropertyHandle property() const final
     {
         return PropertyHandle(attributeName());
     }