Now that we started loading frames with the same registrable domain in the same process, we should add more tests and fix and bugs that are surfaced.
Pull request: https://github.com/WebKit/WebKit/pull/12861
Pull request: https://github.com/WebKit/WebKit/pull/13100
<rdar://problem/108506592>
Committed 263485@main (4c2f5f2e7bf3): <https://commits.webkit.org/263485@main> Reviewed commits have been landed. Closing PR #13100 and removing active labels.