For the _deferrableUserScriptsNeedNotification SPI, we need to reset m_userScriptsNotified when the web process crashes. Otherwise scripts can't be injected again.
Created attachment 397096 [details] Patch
Committed r260446: <https://trac.webkit.org/changeset/260446> All reviewed patches have been landed. Closing bug and clearing flags on attachment 397096 [details].
<rdar://problem/62122502>