ServiceWorker

83a89937 - Add new environment settings object field "cross site ancestry" for SameSite cookies work (#1775)

Add new environment settings object field "cross site ancestry" for SameSite cookies work (#1775) To define how cookies work correctly, particularly around the SameSite attribute, we need to know whether or not an environment settings object has any cross-site ancestors. This is making sure the ESO definition in ServiceWorkers also defines this member algorithm. See whatwg/html#9000 for even broader context.