This function wasn't getting a callback, which caused the asserts not to run, so it looked like the tests passed.
Pull request: https://github.com/WebKit/WebKit/pull/3685
Committed 253853@main (89903febc2f9): <https://commits.webkit.org/253853@main> Reviewed commits have been landed. Closing PR #3685 and removing active labels.
<rdar://problem/99212396>