Give clients the ability to override the WKPreferences that a ServiceWorker gets Right now, they either get preferences from the first page in a process pool, or a default set of preferences if the process pool has never had any. In practice, clients need to control the WKPreferences a ServiceWorker gets - Even if they've never created a WKWebView! e.g. When an app wakes up to handle a web push message. New WKWebsiteDataStore SPI will allow specifying "override preferences for a ServiceWorker"
<rdar://problem/103487822>
Pull request: https://github.com/WebKit/WebKit/pull/7823
Committed 258175@main (20f6befea658): <https://commits.webkit.org/258175@main> Reviewed commits have been landed. Closing PR #7823 and removing active labels.