Resync web-platform-tests/clipboard-apis from upstream.
Created attachment 404590 [details] Patch
Created attachment 404598 [details] Patch
Comment on attachment 404598 [details] Patch rs=me
Committed r264544: <https://trac.webkit.org/changeset/264544> All reviewed patches have been landed. Closing bug and clearing flags on attachment 404598 [details].
<rdar://problem/65748531>