ApplicationCacheHost::isApplicationCacheEnabled() should check for its page being null
As per https://build.webkit.org/results/Apple-iPadOS-15-Simulator-Release-WK2-Tests/251648@main%20(1972)/imported/w3c/web-platform-tests/fetch/api/request/destination/fetch-destination-worker.https-crash-log.txt, ApplicationCacheHost::isApplicationCacheEnabled can be called with page() being null.
Pull request: https://github.com/WebKit/WebKit/pull/1633
Committed r295681 (251686@main): <https://commits.webkit.org/251686@main> Reviewed commits have been landed. Closing PR #1633 and removing active labels.
<rdar://problem/95572996>