It is currently a pointer.
<rdar://problem/45382278>
Created attachment 352725 [details] Patch
Comment on attachment 352725 [details] Patch r=me if the bots are happy.
Comment on attachment 352725 [details] Patch Thanks for reviewing!
Comment on attachment 352725 [details] Patch Clearing flags on attachment: 352725 Committed r237265: <https://trac.webkit.org/changeset/237265>
All reviewed patches have been landed. Closing bug.