We can simplify render tree mutations if some complex cases are handled by tearing down a larger structure with all the associated anonymous boxes and rebuilding them.
<rdar://problem/118744369>
Pull request: https://github.com/WebKit/WebKit/pull/20846
Committed 271082@main (c7578c8aa8bf): <https://commits.webkit.org/271082@main> Reviewed commits have been landed. Closing PR #20846 and removing active labels.