Generate the isSVG*Element() / toSVG*Element() helper functions

Source/core/svg/SVGAnimateMotionElement.cpp

Index: Source/core/svg/SVGAnimateMotionElement.cpp
diff --git a/Source/core/svg/SVGAnimateMotionElement.cpp b/Source/core/svg/SVGAnimateMotionElement.cpp
index 3dece5644f0e72e2e3c5e5a37452d6eea1f34966..715a7ab458d54954bdfb07233f9571cf208e97ec 100644
--- a/Source/core/svg/SVGAnimateMotionElement.cpp
+++ b/Source/core/svg/SVGAnimateMotionElement.cpp
@@ -140,15 +140,11 @@ void SVGAnimateMotionElement::updateAnimationPath()
     m_animationPath = Path();
     bool foundMPath = false;
 
-    for (Element* child = ElementTraversal::firstWithin(*this); child; child = ElementTraversal::nextSibling(*child)) {
-        if (child->hasTagName(SVGNames::mpathTag)) {
-            SVGMPathElement* mPath = toSVGMPathElement(child);
-            SVGPathElement* pathElement = mPath->pathElement();
-            if (pathElement) {
-                updatePathFromGraphicsElement(pathElement, m_animationPath);
-                foundMPath = true;
-                break;
-            }
+    for (SVGMPathElement* mpath = Traversal<SVGMPathElement>::firstChild(*this); mpath; mpath = Traversal<SVGMPathElement>::nextSibling(*mpath)) {
+        if (SVGPathElement* pathElement = mpath->pathElement()) {
+            updatePathFromGraphicsElement(pathElement, m_animationPath);
+            foundMPath = true;
+            break;
         }
     }