Import https://github.com/web-platform-tests/wpt/pull/12450#pullrequestreview-145775152
<rdar://42568342>
Created attachment 347018 [details] Patch
Comment on attachment 347018 [details] Patch Clearing flags on attachment: 347018 Committed r234827: <https://trac.webkit.org/changeset/234827>
All reviewed patches have been landed. Closing bug.