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

Source/core/svg/SVGPathSegCurvetoCubicSmoothRel.h

Index: Source/core/svg/SVGPathSegCurvetoCubicSmoothRel.h
diff --git a/Source/core/svg/SVGPathSegCurvetoCubicSmoothRel.h b/Source/core/svg/SVGPathSegCurvetoCubicSmoothRel.h
index 9a5f3948bcab07f687cd89e940ad07edbb6db18b..6e0e62a30e654fa01b48b84454fae26f31b4751d 100644
--- a/Source/core/svg/SVGPathSegCurvetoCubicSmoothRel.h
+++ b/Source/core/svg/SVGPathSegCurvetoCubicSmoothRel.h
@@ -43,8 +43,8 @@ private:
     SVGPathSegCurvetoCubicSmoothRel(SVGPathElement* element, float x, float y, float x2, float y2)
         : SVGPathSegCurvetoCubicSmooth(element, x, y, x2, y2) { }
 
-    virtual unsigned short pathSegType() const override { return PATHSEG_CURVETO_CUBIC_SMOOTH_REL; }
-    virtual String pathSegTypeAsLetter() const override { return "s"; }
+    unsigned short pathSegType() const override { return PATHSEG_CURVETO_CUBIC_SMOOTH_REL; }
+    String pathSegTypeAsLetter() const override { return "s"; }
 };
 
 } // namespace blink