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

LayoutTests/fast/dom/Element/normalize-crash.html

Index: LayoutTests/fast/dom/Element/normalize-crash.html
diff --git a/LayoutTests/fast/dom/Element/normalize-crash.html b/LayoutTests/fast/dom/Element/normalize-crash.html
deleted file mode 100644
index 9aa77c7afa7a4fbb781db0231c61b7859ac8fd87..0000000000000000000000000000000000000000
--- a/LayoutTests/fast/dom/Element/normalize-crash.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<p>This test passes if it does not crash.</p>
-<div id="test1"></div>
-<script>
-if (window.testRunner)
-    testRunner.dumpAsText();
-
-var elem = document.getElementById("test1");
-
-function go()
-{
-    var str = "c";
-    for (var i = 0; i < 0x10000; i++)
-        var b = str + str;
-}
-
-function handler()
-{
-    elem.removeAttribute("b");
-    go();
-}
-
-elem.setAttribute("b", "a");
-elem.attributes[0].appendChild(document.createTextNode("hi"));
-elem.attributes[0].addEventListener("DOMSubtreeModified", handler,  false);
-elem.normalize();
-</script>