rdar://116202371
Pull request: https://github.com/WebKit/WebKit/pull/25067
Committed 275551@main (4993196dda0c): <https://commits.webkit.org/275551@main> Reviewed commits have been landed. Closing PR #25067 and removing active labels.
Reopened Bugzilla. REGRESSION(275551@main): 3X API-Tests broke across all testing queues, 15X Layout-tests are now broken on site-isolation queues, tracking revert in https://bugs.webkit.org/show_bug.cgi?id=270384.