Bug 596522 - fix breakage from bug 578785 and re-enable test_bug510426.xul. a=testfix

toolkit/content/widgets/notification.xml

@@ -114,11 +114,11 @@
 
             newitem.priority = aPriority;
             if (aPriority >= this.PRIORITY_CRITICAL_LOW)
-              newitem.type = "critical";
+              newitem.setAttribute("type", "critical");
             else if (aPriority <= this.PRIORITY_INFO_HIGH)
-              newitem.type = "info";
+              newitem.setAttribute("type", "info");
             else
-              newitem.type = "warning";
+              newitem.setAttribute("type", "warning");
 
             if (!insertPos) {
               newitem.style.position = "fixed";

toolkit/themes/pinstripe/mochitests/test_bug510426.xul

@@ -26,10 +26,6 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=510426
 SimpleTest.waitForExplicitFinish();
 
 function openNotification() {
-  SimpleTest.todo(false, "test disabled, see bug 596522");
-  SimpleTest.finish();
-  return;
-
   var nb = document.getElementById("nb");
   var n = nb.appendNotification("Notification", "", null,
                                 nb.PRIORITY_WARNING_LOW, [{