CARingBuffer has two implementations for almost the same thing The implementations should share the underlying parallel operation logic.
<rdar://problem/102182871>
Pull request: https://github.com/WebKit/WebKit/pull/6341
Committed 256563@main (a72b93ec11fd): <https://commits.webkit.org/256563@main> Reviewed commits have been landed. Closing PR #6341 and removing active labels.