https://wpt.fyi/results/css/selectors/invalidation?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&view=interop&q=label%3Ainterop-2023-has%20child-indexed
<rdar://problem/106768224>
Pull request: https://github.com/WebKit/WebKit/pull/17394
Committed 267771@main (630e5323e6dc): <https://commits.webkit.org/267771@main> Reviewed commits have been landed. Closing PR #17394 and removing active labels.