Generate toSVGGradient|Graphics|PolyElement()

Source/core/svg/SVGPolyElement.h

Index: Source/core/svg/SVGPolyElement.h
diff --git a/Source/core/svg/SVGPolyElement.h b/Source/core/svg/SVGPolyElement.h
index ed906d0c960709f180680552fb1e686abaf050f2..4cc460158dfc1e6a97f6d8aad047385024c4818f 100644
--- a/Source/core/svg/SVGPolyElement.h
+++ b/Source/core/svg/SVGPolyElement.h
@@ -64,12 +64,13 @@ private:
     END_DECLARE_ANIMATED_PROPERTIES
 };
 
-inline SVGPolyElement* toSVGPolyElement(SVGElement* element)
+inline bool isSVGPolyElement(const Node& node)
 {
-    ASSERT_WITH_SECURITY_IMPLICATION(!element || element->hasTagName(SVGNames::polygonTag) || element->hasTagName(SVGNames::polylineTag));
-    return static_cast<SVGPolyElement*>(element);
+    return node.hasTagName(SVGNames::polygonTag) || node.hasTagName(SVGNames::polylineTag);
 }
 
+DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(SVGPolyElement);
+
 } // namespace WebCore
 
 #endif