Generate toSVGAnimateElement to support more plenty helper functions

Source/core/svg/SVGAnimateElement.h

Index: Source/core/svg/SVGAnimateElement.h
diff --git a/Source/core/svg/SVGAnimateElement.h b/Source/core/svg/SVGAnimateElement.h
index 592613c691ceecd1b67528ae90957374a0cb6b8b..e8b2dc438ab235dfbf2313b5f4d3a77dd3cfbfdf 100644
--- a/Source/core/svg/SVGAnimateElement.h
+++ b/Source/core/svg/SVGAnimateElement.h
@@ -75,16 +75,16 @@ private:
     OwnPtr<SVGAnimatedTypeAnimator> m_animator;
 };
 
-inline SVGAnimateElement* toSVGAnimateElement(Element* element)
+inline bool isSVGAnimateElement(const Node& node)
 {
-    ASSERT_WITH_SECURITY_IMPLICATION(!element
-        || element->hasTagName(SVGNames::animateTag)
-        || element->hasTagName(SVGNames::animateColorTag)
-        || element->hasTagName(SVGNames::animateTransformTag)
-        || element->hasTagName(SVGNames::setTag));
-    return static_cast<SVGAnimateElement*>(element);
+    return node.hasTagName(SVGNames::animateTag)
+        || node.hasTagName(SVGNames::animateColorTag)
+        || node.hasTagName(SVGNames::animateTransformTag)
+        || node.hasTagName(SVGNames::setTag);
 }
 
+DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(SVGAnimateElement);
+
 } // namespace WebCore
 
 #endif // SVGAnimateElement_h