Protect DOMFileSystem when hopping to a background thread
Created attachment 423317 [details] Patch
Comment on attachment 423317 [details] Patch AIUI, this is not strictly needed as the caller of these methods makes sure to ref DOMFileSystem in our code path. It seems safer to ref it anyway.
Committed r274482: <https://commits.webkit.org/r274482> All reviewed patches have been landed. Closing bug and clearing flags on attachment 423317 [details].
<rdar://problem/75479783>