so that we don't have to re-construct the tree on every layout frame when some style changes.
<rdar://problem/57226354>
Created attachment 383613 [details] Patch
Comment on attachment 383613 [details] Patch Clearing flags on attachment: 383613 Committed r252483: <https://trac.webkit.org/changeset/252483>
All reviewed patches have been landed. Closing bug.