diff -r 000000000000 -r 6474c204b198 dom/interfaces/html/nsIDOMTimeRanges.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/html/nsIDOMTimeRanges.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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 "domstubs.idl"
+
+[scriptable, uuid(c43448db-0bab-461d-b648-1ca14a967f7e)]
+interface nsIDOMTimeRanges : nsISupports
+{
+  /* The number of ranges represented by the time range object */
+  readonly attribute unsigned long length;
+
+  /* The position of the start of the index'd range, in seconds measured
+     from the start of the timeline that this object represents */
+  double start(in unsigned long index);
+
+  /* The position of the end of the index'd range, in seconds measured
+     from the start of the timeline that this object represents */
+  double end(in unsigned long index);
+};