LocalSampleBufferDisplayLayer::enqueueVideoFrame callback needs to call assertIsCurrent after checking weakThis
<rdar://problem/111744695>
Pull request: https://github.com/WebKit/WebKit/pull/15545
Committed 265762@main (821738a04d27): <https://commits.webkit.org/265762@main> Reviewed commits have been landed. Closing PR #15545 and removing active labels.