WipeContainingBlock to be called. This was because the undisplayed node had a psuedo style that wasn't being properly reolved to this code thought the comment was now visible instead of being hidden. b=none r=pierre,attinasi git-svn-id: svn://10.0.0.236/trunk@59070 18797224-902f-48f8-a5cc-f745e15eee43