CONSOLE WARNING: Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check http://xhr.spec.whatwg.org/. This test verifies that sandboxed iframe has XmlHttpRequest access to the server that accepts all domains. It will print "PASS" on success. -------- Frame: '-->' -------- PASS: Sandboxed iframe XHR access allowed.