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

Source/core/svg/SVGPathSegArcRel.h

Index: Source/core/svg/SVGPathSegArcRel.h
diff --git a/Source/core/svg/SVGPathSegArcRel.h b/Source/core/svg/SVGPathSegArcRel.h
index b4b426b7162cfc43ee1d4a7ee7e3ef202d6f4cc5..a5fd98c29b47699b38104edef214fed6e172ae50 100644
--- a/Source/core/svg/SVGPathSegArcRel.h
+++ b/Source/core/svg/SVGPathSegArcRel.h
@@ -43,8 +43,8 @@ private:
     SVGPathSegArcRel(SVGPathElement* element, float x, float y, float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag)
         : SVGPathSegArc(element, x, y, r1, r2, angle, largeArcFlag, sweepFlag) { }
 
-    virtual unsigned short pathSegType() const override { return PATHSEG_ARC_REL; }
-    virtual String pathSegTypeAsLetter() const override { return "a"; }
+    unsigned short pathSegType() const override { return PATHSEG_ARC_REL; }
+    String pathSegTypeAsLetter() const override { return "a"; }
 };
 
 } // namespace blink