CONSOLE ERROR: line 12: Uncaught SecurityError: Failed to read the 'contentDocument' property from 'HTMLIFrameElement': Blocked a frame with origin "http://127.0.0.1:8000" from accessing a frame with origin "null".  The frame requesting access has a protocol of "http", the frame being accessed has a protocol of "data". Protocols must match.

We pass if we don't crash. 
