CONSOLE MESSAGE: SecurityError: Blocked a frame with origin "null" from accessing a cross-origin frame. Protocols, domains, and ports must match.
This tests that a data: URL loaded in an iframe inside another data: URL loaded iframe doesn't have access to the main frame.


PASS: Cross frame access from a data: URL inside another data: URL was denied.

--------
Frame: 'aFrame'
--------
Inner iframe.


--------
Frame: '<!--frame1-->'
--------
Inner-inner iframe.