_WKNSWindowExtras.h: Add missing availability annotation Missed in r226536.
Created attachment 331773 [details] [PATCH] Proposed Fix
Comment on attachment 331773 [details] [PATCH] Proposed Fix Clearing flags on attachment: 331773 Committed r227231: <https://trac.webkit.org/changeset/227231>
All reviewed patches have been landed. Closing bug.
<rdar://problem/36668801>