Add threading assertions to WebStorage code for extra safety.
Created attachment 375847 [details] Patch
Comment on attachment 375847 [details] Patch r=me
Comment on attachment 375847 [details] Patch Clearing flags on attachment: 375847 Committed r248452: <https://trac.webkit.org/changeset/248452>
All reviewed patches have been landed. Closing bug.
<rdar://problem/54103619>