https://www.w3.org/TR/css-highlight-api-1/#painting
<rdar://problem/112907577>
Pull request: https://github.com/WebKit/WebKit/pull/16101
Committed 266349@main (0ef0801e78b6): <https://commits.webkit.org/266349@main> Reviewed commits have been landed. Closing PR #16101 and removing active labels.