<rdar://112269436> CoreAnimation doesn't guarantee to have marked the IOSurface as in-use until the transaction is committed, not once the layer mutation happens.
Pull request: https://github.com/WebKit/WebKit/pull/16821
Committed 267204@main (346fdad1569d): <https://commits.webkit.org/267204@main> Reviewed commits have been landed. Closing PR #16821 and removing active labels.