diff -r 000000000000 -r 6474c204b198 toolkit/mozapps/update/common/uachelper.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/mozapps/update/common/uachelper.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+/* 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/. */
+
+#ifndef _UACHELPER_H_
+#define _UACHELPER_H_
+
+class UACHelper
+{
+public:
+  static HANDLE OpenUserToken(DWORD sessionID);
+  static HANDLE OpenLinkedToken(HANDLE token);
+  static BOOL DisablePrivileges(HANDLE token);
+  static bool CanUserElevate();
+
+private:
+  static BOOL SetPrivilege(HANDLE token, LPCTSTR privs, BOOL enable);
+  static BOOL DisableUnneededPrivileges(HANDLE token, 
+                                        LPCTSTR *unneededPrivs, size_t count);
+  static LPCTSTR PrivsToDisable[];  
+};
+
+#endif