Re-sync web-platform-tests/dom/traversal from upstream
Created attachment 376310 [details] Patch
Created attachment 376316 [details] Patch Fix support file.
Let's wait for EWS before landing this.
Comment on attachment 376316 [details] Patch Clearing flags on attachment: 376316 Committed r248705: <https://trac.webkit.org/changeset/248705>
All reviewed patches have been landed. Closing bug.
<rdar://problem/54330868>