Now that the binding generator adds a promiseDeferred member for each promise-typed attribute, we can use it for ReadableStreamReader closed attribute and remove the internal slot routines.
Created attachment 253452 [details] Patch
Comment on attachment 253452 [details] Patch Clearing flags on attachment: 253452 Committed r184723: <http://trac.webkit.org/changeset/184723>
All reviewed patches have been landed. Closing bug.