Bug 1132566 - Enable test in e10s: browser_privatebrowsing_nonbrowser.js; r=billm

This test appeared to run fine under e10s, so after running 30 times
with "mochitest-browser --e10s --run-until-failure" I've re-enabled it.

--HG--
extra : rebase_source : 48b1a342709086097fa30de11ab497a83b310bdf

browser/components/privatebrowsing/test/browser/browser.ini

@@ -36,7 +36,6 @@ skip-if = e10s # Bug 1139953 - Accept cookie dialog shown in private window when
 [browser_privatebrowsing_localStorage_before_after.js]
 [browser_privatebrowsing_noSessionRestoreMenuOption.js]
 [browser_privatebrowsing_nonbrowser.js]
-skip-if = e10s
 [browser_privatebrowsing_opendir.js]
 skip-if = e10s
 [browser_privatebrowsing_placesTitleNoUpdate.js]