Tests the behavior of no-referrer-when-downgrade referrer policy when cross origin.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS referrer is "http://127.0.0.1:8000/referrer-policy-iframe/no-referrer-when-downgrade/cross-origin-http-http.html"
PASS successfullyParsed is true

TEST COMPLETE