Part of removing webkitpy's autoinstaller in favor of webkitcorepy's.
<rdar://problem/67683133>
Created attachment 407106 [details] Patch
Comment on attachment 407106 [details] Patch rs=me
Created attachment 409305 [details] Patch
Created attachment 409312 [details] Patch for landing
Committed r267365: <https://trac.webkit.org/changeset/267365> All reviewed patches have been landed. Closing bug and clearing flags on attachment 409312 [details].