diff -r 000000000000 -r 6474c204b198 dom/webidl/MozWakeLock.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/MozWakeLock.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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/. */
+
+[Pref="dom.wakelock.enabled", Func="Navigator::HasWakeLockSupport"]
+interface MozWakeLock
+{
+    readonly attribute DOMString topic;
+
+    /**
+     * Release the wake lock.
+     * @throw NS_ERROR_DOM_INVALID_STATE_ERR if already unlocked.
+     */
+    [Throws]
+    void unlock();
+};