Add List.insert.

tools/dom/templates/html/impl/impl_Node.darttemplate

Index: tools/dom/templates/html/impl/impl_Node.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Node.darttemplate b/tools/dom/templates/html/impl/impl_Node.darttemplate
index b113a5aaf7b3e905e603e5b4647199ddf2dc8e88..d1764d0fc16db79748bc6829b4d1cd01fb7bafea 100644
--- a/tools/dom/templates/html/impl/impl_Node.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Node.darttemplate
@@ -83,6 +83,15 @@ $endif
     }
   }
 
+  void insert(int index, Node node) {
+    if (index < 0 || index > length) throw RangeError(index);
+    if (index == length) {
+      _this.$dom_appendChild(node);
+    } else {
+      throw new UnimplementedError("insert on NodeLists");

[Lasse Reichstein Nielsen, 2013/03/07 09:57:53]

And
 _this.$dom_insertBefore(node, _this.$dom_childNodes[index]);

[floitsch, 2013/03/07 12:53:53]

There is no 'dom_insertBefore' in Dart.

[blois, 2013/03/08 02:32:40]

It's just insertBefore, on node.

+    }
+  }
+
   Node removeLast() {
     final result = last;
     if (result != null) {