Use a WeakHashSet for WKProcessAssertionBackgroundTaskManager._assertionsNeedingBackgroundTask, instead of a HashSet of raw pointers, for extra safety.
Created attachment 386140 [details] Patch
Comment on attachment 386140 [details] Patch Clearing flags on attachment: 386140 Committed r253794: <https://trac.webkit.org/changeset/253794>
All reviewed patches have been landed. Closing bug.
<rdar://problem/58094829>