
PASS Cross-origin fetch in a data: iframe load fails if the server blocks cross-origin loads with a 'Cross-Origin-Resource-Policy: same-origin' response header. 
PASS Cross-origin fetch in a data: iframe load fails if the server blocks cross-origin loads with a 'Cross-Origin-Resource-Policy: same-site' response header. 
PASS Cross-origin fetch in a cross origin iframe load fails if the server blocks cross-origin loads with a 'Cross-Origin-Resource-Policy: same-origin' response header. 
PASS Cross-origin fetch in a cross origin iframe load fails if the server blocks cross-origin loads with a 'Cross-Origin-Resource-Policy: same-site' response header. 
PASS Same-origin fetch in a cross origin iframe load succeeds if the server blocks cross-origin loads with a 'Cross-Origin-Resource-Policy: same-origin' response header.