Remove Attr child nodes (making Attr a Node, not a ContainerNode)

LayoutTests/fast/events/touch/touch-event-target-crash.html

Index: LayoutTests/fast/events/touch/touch-event-target-crash.html
diff --git a/LayoutTests/fast/events/touch/touch-event-target-crash.html b/LayoutTests/fast/events/touch/touch-event-target-crash.html
index 7100e1626095ac977f28c77dddd80f5ec92eaf76..f404b9af1bcff1c0df4ccb547f36936da2037ae6 100644
--- a/LayoutTests/fast/events/touch/touch-event-target-crash.html
+++ b/LayoutTests/fast/events/touch/touch-event-target-crash.html
@@ -7,26 +7,22 @@ if (window.testRunner)
 var docElement = document.documentElement;
 function crash() {
     svgAnimAttributeElement1 = document.createElementNS("http://www.w3.org/2000/svg", "animattributeattrs");
-    mathElement1 = document.createElementNS("http://www.w3.org/1998/Math/MathML", "math");
-    mathElement1.setAttribute("class", "c0");
     svgAnimateElement1 = document.createElementNS("http://www.w3.org/2000/svg", "animate");
     svgTestcaseElement1 = document.createElementNS("http://www.w3.org/2000/svg", "svgtestcase");
     svgEllipseElement1 = document.createElementNS("http://www.w3.org/2000/svg", "ellipse");
-    mathElement2 = document.createElementNS("http://www.w3.org/1998/Math/MathML", "math");
-    docElement.appendChild(mathElement2);
+    mathElement1 = document.createElementNS("http://www.w3.org/1998/Math/MathML", "math");
+    docElement.appendChild(mathElement1);
     svgLineElement1 = document.createElementNS("http://www.w3.org/2000/svg", "line");
     textNode1 = document.createTextNode("mNfma;B N`p0ag     ");
     svgEllipseElement1.addEventListener("touchcancel", function () {}, false);
     document1 = document.implementation.createDocument("", null);
     svgAnimateElement1.appendChild(svgEllipseElement1);
-    mathElement1.attributes[0].appendChild(textNode1);
-    mathElement2.appendChild(svgAnimateElement1);
+    mathElement1.appendChild(svgAnimateElement1);
     document1.appendChild(svgLineElement1);
     svgLineElement1.appendChild(svgTestcaseElement1);
-    mathElement1.attributes[0].addEventListener("DOMSubtreeModified", function () { document.open(); }, false);
     svgTestcaseElement1.appendChild(svgAnimAttributeElement1);
     document2 = document.implementation.createDocument("http://www.w3.org/1999/xhtml", "html"); document2.adoptNode(textNode1);
-    svgAnimAttributeElement1.appendChild(mathElement2);
+    svgAnimAttributeElement1.appendChild(mathElement1);
     svgEllipseElement1.parentNode.removeChild(svgEllipseElement1);
     delete svgEllipseElement1;
     gc();
@@ -36,4 +32,4 @@ function crash() {
 }
 document.addEventListener("DOMContentLoaded", crash, false);
 </script>
-</html>
+</html>