Drop support for cross-origin-window-policy header as this was never enabled and its design has some issues we have not resolved. An alternative is being worked on but will be substantially different so there is not much value in keeping this code around.
Created attachment 351088 [details] Patch
Comment on attachment 351088 [details] Patch Clearing flags on attachment: 351088 Committed r236623: <https://trac.webkit.org/changeset/236623>
All reviewed patches have been landed. Closing bug.
<rdar://problem/44878327>