Avoid GCReacheableRefMap lookup inside JSNodeOwner::isReachableFromOpaqueRoots() by leveraging a flag on Node.
Pull request: https://github.com/WebKit/WebKit/pull/1139
Committed r295059 (251154@main): <https://commits.webkit.org/251154@main> Reviewed commits have been landed. Closing PR #1139 and removing active labels.
<rdar://problem/94164278>