Bug 990322 - Prevent browser_newtab_bug991111.js from accessing a remote domain

browser/base/content/test/newtab/browser_newtab_bug991111.js

@@ -2,7 +2,7 @@
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 function runTests() {
-  yield setLinks("0");
+  yield setLinks("-1");
   yield addNewTabPageTab();
 
   // Remember if the click handler was triggered