Check for callback being null in Notification.requestPermission
<rdar://problem/59130804>
Created attachment 389644 [details] Patch
Comment on attachment 389644 [details] Patch r=me. Not in this patch but it would be good to update this method to return a Promise as well.
Comment on attachment 389644 [details] Patch Clearing flags on attachment: 389644 Committed r255680: <https://trac.webkit.org/changeset/255680>
All reviewed patches have been landed. Closing bug.