diff -r 000000000000 -r 6474c204b198 dom/webidl/TreeWalker.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/TreeWalker.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface TreeWalker {
+  [Constant]
+  readonly attribute Node root;
+  [Constant]
+  readonly attribute unsigned long whatToShow;
+  [Constant]
+  readonly attribute NodeFilter? filter;
+  [Pure, SetterThrows]
+           attribute Node currentNode;
+
+  [Throws]
+  Node? parentNode();
+  [Throws]
+  Node? firstChild();
+  [Throws]
+  Node? lastChild();
+  [Throws]
+  Node? previousSibling();
+  [Throws]
+  Node? nextSibling();
+  [Throws]
+  Node? previousNode();
+  [Throws]
+  Node? nextNode();
+};