LocalStorageDatabaseTracker does not need to subclass ThreadSafeRefCounted, it is always ref'd / deref'd from the com.apple.WebKit.WebStorage serial WorkQueue.
Created attachment 376525 [details]
Created attachment 376535 [details]
Comment on attachment 376535 [details]
Clearing flags on attachment: 376535
Committed r248808: <https://trac.webkit.org/changeset/248808>
All reviewed patches have been landed. Closing bug.