The value of aria-level is not exposed on non-heading roles. It should be exposed via an AtkObject attribute, as is currently done for headings.
<rdar://problem/34775360>
Created attachment 322432 [details] Patch
Comment on attachment 322432 [details] Patch Clearing flags on attachment: 322432 Committed r222765: <http://trac.webkit.org/changeset/222765>
All reviewed patches have been landed. Closing bug.