Resync web-platform-tests/streams from upstream.
Created attachment 404012 [details] Patch
Comment on attachment 404012 [details] Patch rs=me
Created attachment 404024 [details] Patch
Created attachment 404043 [details] Patch
Committed r264263: <https://trac.webkit.org/changeset/264263> All reviewed patches have been landed. Closing bug and clearing flags on attachment 404043 [details].
<rdar://problem/65382132>