Generate toSVGSVG|Stop|TextContentElement()

Source/core/svg/SVGStopElement.h

Index: Source/core/svg/SVGStopElement.h
diff --git a/Source/core/svg/SVGStopElement.h b/Source/core/svg/SVGStopElement.h
index 4331a4a60af3bd49dfa0c540abd8d8ca8e1a8cc4..6b941f2e5035f0d905c0b2eadbbb51c8a5bd08f7 100644
--- a/Source/core/svg/SVGStopElement.h
+++ b/Source/core/svg/SVGStopElement.h
@@ -50,12 +50,13 @@ private:
     END_DECLARE_ANIMATED_PROPERTIES
 };
 
-inline SVGStopElement* toSVGStopElement(Node* node)
+inline bool isSVGStopElement(const Node& node)
 {
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || toSVGElement(node)->isGradientStop());
-    return static_cast<SVGStopElement*>(node);
+    return node.isSVGElement() && toSVGElement(node).isGradientStop();
 }
 
+DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(SVGStopElement);
+
 } // namespace WebCore
 
 #endif