We want to define some _WKWebsiteDataStoreDelegate callbacks that get called when certain properties on WindowProxy get accessed on windows associated with either side of a window.open call.
<rdar://problem/118852728>
Pull request: https://github.com/WebKit/WebKit/pull/20957
Committed 271575@main (d7e49edab112): <https://commits.webkit.org/271575@main> Reviewed commits have been landed. Closing PR #20957 and removing active labels.