A first version of the implementation is attached to bug #95223.
The code also needs specific testing framework updates from bug #94980.
Created attachment 170196 [details]
Patch not for formal review
Created attachment 170517 [details]
(In reply to comment #2)
> Created an attachment (id=170517) [details]
Comment on attachment 170517 [details]
Clearing flags on attachment: 170517
Committed r132795: <http://trac.webkit.org/changeset/132795>
All reviewed patches have been landed. Closing bug.