See bug 100865 which introduced this, and https://bugs.chromium.org/p/chromium/issues/detail?id=461389 which reverted this in Blink. It seems like almost nobody understood these messages, and they're pretty noisy, so let's just remove them.
Pull request: https://github.com/WebKit/WebKit/pull/1010
Committed r294886 (251014@main): <https://commits.webkit.org/251014@main> Reviewed commits have been landed. Closing PR #1010 and removing active labels.
<rdar://problem/93985305>