These bits have to do with the privileges of various security origins, like the origin whitelists.
Created attachment 40692 [details] Patch v1
Comment on attachment 40692 [details] Patch v1 I'm not sure these make any more sense on SecurityOrigin... but OK. LGTM.
Comment on attachment 40692 [details] Patch v1 Clearing flags on attachment: 40692 Committed r49211: <http://trac.webkit.org/changeset/49211>
All reviewed patches have been landed. Closing bug.