diff -r 000000000000 -r 6474c204b198 dom/interfaces/events/nsIDOMStyleSheetApplicableStateChangeEvent.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/events/nsIDOMStyleSheetApplicableStateChangeEvent.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+/* -*- 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/. */
+
+#include "nsIDOMEvent.idl"
+
+interface nsIDOMCSSStyleSheet;
+
+[scriptable, builtinclass, uuid(75f27960-fd1a-4e05-8b8b-55d97ea22a9a)]
+interface nsIDOMStyleSheetApplicableStateChangeEvent : nsIDOMEvent
+{
+  readonly attribute nsIDOMCSSStyleSheet stylesheet;
+  readonly attribute boolean applicable;
+  [noscript] void initStyleSheetApplicableStateChangeEvent(in DOMString aTypeArg,
+                                                           in boolean aCanBubbleArg,
+                                                           in boolean aCancelableArg,
+                                                           in nsIDOMCSSStyleSheet aStyleSheet,
+                                                           in boolean aApplicable);
+};