Fix virtual/override/final usage in Source/core/svg/.

Source/core/svg/SVGNumberOptionalNumber.h

Index: Source/core/svg/SVGNumberOptionalNumber.h
diff --git a/Source/core/svg/SVGNumberOptionalNumber.h b/Source/core/svg/SVGNumberOptionalNumber.h
index 1f02294465ceb4a1c263aa7a1c42c03259b730a1..ae3c398c000dd4b297cf63976e954edfa31e8628 100644
--- a/Source/core/svg/SVGNumberOptionalNumber.h
+++ b/Source/core/svg/SVGNumberOptionalNumber.h
@@ -48,14 +48,14 @@ public:
     }
 
     PassRefPtrWillBeRawPtr<SVGNumberOptionalNumber> clone() const;
-    virtual PassRefPtrWillBeRawPtr<SVGPropertyBase> cloneForAnimation(const String&) const override;
+    PassRefPtrWillBeRawPtr<SVGPropertyBase> cloneForAnimation(const String&) const override;
 
-    virtual String valueAsString() const override;
+    String valueAsString() const override;
     void setValueAsString(const String&, ExceptionState&);
 
-    virtual void add(PassRefPtrWillBeRawPtr<SVGPropertyBase>, SVGElement*) override;
-    virtual void calculateAnimatedValue(SVGAnimationElement*, float percentage, unsigned repeatCount, PassRefPtrWillBeRawPtr<SVGPropertyBase> from, PassRefPtrWillBeRawPtr<SVGPropertyBase> to, PassRefPtrWillBeRawPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement* contextElement) override;
-    virtual float calculateDistance(PassRefPtrWillBeRawPtr<SVGPropertyBase> to, SVGElement* contextElement) override;
+    void add(PassRefPtrWillBeRawPtr<SVGPropertyBase>, SVGElement*) override;
+    void calculateAnimatedValue(SVGAnimationElement*, float percentage, unsigned repeatCount, PassRefPtrWillBeRawPtr<SVGPropertyBase> from, PassRefPtrWillBeRawPtr<SVGPropertyBase> to, PassRefPtrWillBeRawPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement* contextElement) override;
+    float calculateDistance(PassRefPtrWillBeRawPtr<SVGPropertyBase> to, SVGElement* contextElement) override;
 
     static AnimatedPropertyType classType() { return AnimatedNumberOptionalNumber; }