SSIA It is not full sync but just adding FIXME where applicable to make it easier to track what we need to do in future. Will add web-spec (interface) links as well to make it easier to follow-up in future.
Committed 267323@main (08c40bd4fc5a): <https://commits.webkit.org/267323@main> Reviewed commits have been landed. Closing PR #17080 and removing active labels.
<rdar://problem/114492066>