diff -r 000000000000 -r 6474c204b198 dom/webidl/HTMLOutputElement.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/HTMLOutputElement.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.whatwg.org/specs/web-apps/current-work/#the-output-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-output-element
+interface HTMLOutputElement : HTMLElement {
+  [PutForwards=value, Constant]
+  readonly attribute DOMSettableTokenList htmlFor;
+  readonly attribute HTMLFormElement? form;
+  [SetterThrows, Pure]
+           attribute DOMString name;
+
+  [Constant]
+  readonly attribute DOMString type;
+  [SetterThrows, Pure]
+           attribute DOMString defaultValue;
+  [SetterThrows, Pure]
+           attribute DOMString value;
+
+  readonly attribute boolean willValidate;
+  readonly attribute ValidityState validity;
+  readonly attribute DOMString validationMessage;
+  boolean checkValidity();
+  void setCustomValidity(DOMString error);
+
+// Not yet implemented (bug 556743).
+//  readonly attribute NodeList labels;
+};