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.
Created attachment 319216 [details]
Created attachment 319301 [details]
Comment on attachment 319301 [details]
Clearing flags on attachment: 319301
Committed r221337: <http://trac.webkit.org/changeset/221337>
All reviewed patches have been landed. Closing bug.