Bug 1255538 Followup bustage fix as Services isn't in every context that tasksOverlay.js is in rs=me a=me Bustage fix.

suite/common/tasksOverlay.js

@@ -3,7 +3,8 @@
  * 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/. */
 
-Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+Components.utils.import("resource://gre/modules/Services.jsm");
 
 function toNavigator()
 {