diff -r 000000000000 -r 6474c204b198 dom/interfaces/events/nsIDOMProgressEvent.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/events/nsIDOMProgressEvent.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,26 @@
+/* -*- 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 "nsIDOMEvent.idl"
+
+/**
+ * ProgressEvent can be used for measuring progress.
+ */
+
+[scriptable, builtinclass, uuid(e0682338-4c3f-4d3a-9487-d7492ea76335)]
+interface nsIDOMProgressEvent : nsIDOMEvent
+{
+  readonly attribute boolean lengthComputable;
+  readonly attribute unsigned long long loaded;
+  readonly attribute unsigned long long total;
+  [noscript]
+  void initProgressEvent(in DOMString typeArg,
+                         in boolean canBubbleArg,
+                         in boolean cancelableArg,
+                         in boolean lengthComputableArg,
+                         in unsigned long long loadedArg,
+                         in unsigned long long totalArg);
+};