Otherwise, there are chances that events get fired between the time it is closed and the time it is stopped.
See rdar://problem/47697857
Created attachment 362090 [details] Patch
Comment on attachment 362090 [details] Patch Clearing flags on attachment: 362090 Committed r241592: <https://trac.webkit.org/changeset/241592>
All reviewed patches have been landed. Closing bug.
<rdar://problem/48115246>