Part of removing webkitpy's autoinstaller in favor of webkitcorepy's.
<rdar://problem/70356095>
Created attachment 411504 [details] Patch
rs=me
Created attachment 411593 [details] Patch for landing
Committed r268597: <https://trac.webkit.org/changeset/268597> All reviewed patches have been landed. Closing bug and clearing flags on attachment 411593 [details].