when the original content is adjusted and we need to renderer a slightly different content (e.g. hyphens, text-overflow: ellipsis)
Created attachment 413137 [details] Patch
Committed r269402: <https://trac.webkit.org/changeset/269402> All reviewed patches have been landed. Closing bug and clearing flags on attachment 413137 [details].
<rdar://problem/71055974>