We currently only do domain prewarming for navigation process swaps.
Created attachment 351951 [details] patch
Comment on attachment 351951 [details] patch r=me, nice.
Comment on attachment 351951 [details] patch Clearing flags on attachment: 351951 Committed r237004: <https://trac.webkit.org/changeset/237004>
All reviewed patches have been landed. Closing bug.
<rdar://problem/45165069>