Bug 961380 - Should be able to undo closing tabs in private windows r=yoric, ui-r=phlsa

From 0e17ede5f79d9894b8fc7d391615767766dd9aa6 Mon Sep 17 00:00:00 2001

--HG--
rename : browser/components/sessionstore/src/PrivacyLevelFilter.jsm => browser/components/sessionstore/src/PrivacyFilter.jsm