Currently when the tests need to clear all cookies they them one by one, even though there is an API that does it in batch (see https://bugs.webkit.org/show_bug.cgi?id=240671 for related discussion).
Pull request: https://github.com/WebKit/WebKit/pull/847
<rdar://problem/94049346>
Committed r294977 (251081@main): <https://commits.webkit.org/251081@main> Reviewed commits have been landed. Closing PR #847 and removing active labels.