Updated SVGListPropertyHelper as per SVG2 Spec

Source/core/svg/SVGPathSegMovetoAbs.h

Index: Source/core/svg/SVGPathSegMovetoAbs.h
diff --git a/Source/core/svg/SVGPathSegMovetoAbs.h b/Source/core/svg/SVGPathSegMovetoAbs.h
index 36d362c531af06dab0fc87aa87808c38c1eb7385..f3dd99d967cdf7034980c7454602de07204e3490 100644
--- a/Source/core/svg/SVGPathSegMovetoAbs.h
+++ b/Source/core/svg/SVGPathSegMovetoAbs.h
@@ -34,6 +34,11 @@ public:
         return adoptRefWillBeNoop(new SVGPathSegMovetoAbs(element, x, y));
     }
 
+    PassRefPtrWillBeRawPtr<SVGPathSeg> clone() override
+    {
+        return adoptRefWillBeNoop(new SVGPathSegMovetoAbs(nullptr, x(), y()));
+    }
+
 private:
     SVGPathSegMovetoAbs(SVGPathElement* element, float x, float y)
         : SVGPathSegSingleCoordinate(element, x, y) { }