The Commit object should have a built-in JSON decoder.
<rdar://problem/70151709>
Created attachment 410971 [details] Patch
r=me
Created attachment 411051 [details] Patch
Created attachment 411053 [details] Patch
Committed r268319: <https://trac.webkit.org/changeset/268319> All reviewed patches have been landed. Closing bug and clearing flags on attachment 411053 [details].