diff -r 000000000000 -r 6474c204b198 dom/webidl/VTTRegion.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/VTTRegion.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* -*- 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://dev.w3.org/html5/webvtt/#extension-of-the-texttrack-interface-for-region-support
+ */
+
+[Constructor, Func="TextTrackRegion::RegionsEnabled"]
+interface VTTRegion {
+           [SetterThrows]
+           attribute double width;
+
+           attribute long lines;
+
+           [SetterThrows]
+           attribute double regionAnchorX;
+           [SetterThrows]
+           attribute double regionAnchorY;
+           [SetterThrows]
+           attribute double viewportAnchorX;
+           [SetterThrows]
+           attribute double viewportAnchorY;
+           [SetterThrows]
+           attribute DOMString scroll;
+};