Resync web-platform-tests/html tests from upstream.
Created attachment 413470 [details] Patch
Created attachment 413475 [details] Patch
Created attachment 413491 [details] Patch
Created attachment 413498 [details] Patch
Created attachment 413587 [details] Patch
Comment on attachment 413587 [details] Patch rs=me
Created attachment 413622 [details] Patch
Committed r269598: <https://trac.webkit.org/changeset/269598> All reviewed patches have been landed. Closing bug and clearing flags on attachment 413622 [details].
<rdar://problem/71207431>