We need to make it more clean when we are disallowing updates to either the actual backing store (recreating the tiled region) or to the tile buffers, as this has caused confusions in the past.
Created attachment 130136 [details] Patch
Comment on attachment 130136 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=130136&action=review > Source/WebCore/ChangeLog:3 > + Make it explit when we are allowing updates to the actual backing store or the tile buffers you mean explicit?
Committed r109897: <http://trac.webkit.org/changeset/109897>