The NetworkProcess::updateCookiePartitioningForTopPrivatelyOwnedDomains always notifies the default website data store about observations it has made. This should be revised so that WebKit clients that register custom data stores through the WKWebsiteDataStores API can be assured that observations made in one session do not manipulate data from another session.
<rdar://problem/33338238>
Created attachment 319216 [details] Patch
Created attachment 319301 [details] Patch
Comment on attachment 319301 [details] Patch Clearing flags on attachment: 319301 Committed r221337: <http://trac.webkit.org/changeset/221337>
All reviewed patches have been landed. Closing bug.