CONSOLE MESSAGE: SecurityError: Blocked a frame with origin "http://127.0.0.1:8000" from accessing a cross-origin frame. Protocols, domains, and ports must match.
This tests that frame used when setting eventListeners on an XMLHttpRequest with the shortcut (onreadystatechange), is the requests frame. (rdar://problem/5426142). This test passes if you don't see an alert dialog with the domain of "localhost" in it and an "Unsafe JavaScript" warning is logged to the console.