diff -r 000000000000 -r 6474c204b198 dom/tests/mochitest/gamepad/mock_gamepad.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/tests/mochitest/gamepad/mock_gamepad.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+var GamepadService = (function() {
+  return SpecialPowers.Cc["@mozilla.org/gamepad-test;1"].getService(SpecialPowers.Ci.nsIGamepadServiceTest);
+})();