diff -r 000000000000 -r 6474c204b198 widget/nsIGfxInfoDebug.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/nsIGfxInfoDebug.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+/* -*- Mode: C++; 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/. */
+
+#include "nsISupports.idl"
+
+/* NOTE: this interface is only implemented in debug builds */
+
+[scriptable, uuid(ca7b0bc7-c67c-4b79-8270-ed7ba002af08)]
+interface nsIGfxInfoDebug : nsISupports
+{
+  void spoofVendorID(in DOMString aVendorID);
+  void spoofDeviceID(in DOMString aDeviceID);
+  
+  void spoofDriverVersion(in DOMString aDriverVersion);
+
+  void spoofOSVersion(in unsigned long aVersion);
+};