[Fullscreen] Restore ASSERT_NOT_REACHED() checks in exit fullscreen handler after r231924
<rdar://problem/37277469>
Created attachment 343383 [details] Patch
Comment on attachment 343383 [details] Patch Clearing flags on attachment: 343383 Committed r233112: <https://trac.webkit.org/changeset/233112>
All reviewed patches have been landed. Closing bug.
Re-opened since this is blocked by bug 187300
*** Bug 187293 has been marked as a duplicate of this bug. ***
*** Bug 182527 has been marked as a duplicate of this bug. ***