diff -r 000000000000 -r 6474c204b198 dom/webidl/CSSValue.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/CSSValue.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+/* -*- 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/.
+ */
+
+interface CSSValue {
+
+  // UnitTypes
+  const unsigned short      CSS_INHERIT                    = 0;
+  const unsigned short      CSS_PRIMITIVE_VALUE            = 1;
+  const unsigned short      CSS_VALUE_LIST                 = 2;
+  const unsigned short      CSS_CUSTOM                     = 3;
+
+           [Throws]
+           attribute DOMString        cssText;
+
+  readonly attribute unsigned short   cssValueType;
+};