It was added to DRT in http://trac.webkit.org/changeset/86204 and it needs to be added to WTR.
The tests were appropriately added to the WK2 Skipped list in that revision, but no separate bug was filed to cover adding support.
Created attachment 163298 [details]
Comment on attachment 163298 [details]
Clearing flags on attachment: 163298
Committed r128157: <http://trac.webkit.org/changeset/128157>
All reviewed patches have been landed. Closing bug.