Resync web-platform-tests/payment-request from upstream.
Created attachment 403935 [details] Patch
Comment on attachment 403935 [details] Patch rs=me
Created attachment 403969 [details] Patch
Created attachment 403994 [details] Patch
Created attachment 403998 [details] Patch
Committed r264239: <https://trac.webkit.org/changeset/264239> All reviewed patches have been landed. Closing bug and clearing flags on attachment 403998 [details].
<rdar://problem/65365616>