diff -r 000000000000 -r 6474c204b198 dom/webidl/Constraints.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/Constraints.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,25 @@
+/* -*- 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/.
+ */
+
+// These dictionaries need to be in a separate file from their use in unions
+// in MediaTrackConstraintSet.webidl due to a webidl compiler limitation.
+
+enum VideoFacingModeEnum {
+    "user",
+    "environment",
+    "left",
+    "right"
+};
+
+dictionary ConstrainLongRange {
+    long min = -2147483647; // +1 works around windows compiler bug
+    long max = 2147483647;
+};
+
+dictionary ConstrainDoubleRange {
+    unrestricted double min = -Infinity;
+    unrestricted double max = Infinity;
+};