Test that links to UISourceCode work correctly when navigating OOPIF

Navigating main frame
Current messages:
  - http://127.0.0.1:8000/devtools/oopif/resources/error.html Error 'Error from error.html':2:8
Revealing main frame source

Creating iframe
Current messages:
  - http://127.0.0.1:8000/devtools/oopif/resources/error.html Error 'Error from error.html':2:8
  - http://devtools.oopif.test:8000/devtools/oopif/resources/error.html Error 'Error from error.html':2:8
Revealing iframe source

Navigating iframe
Current messages:
  - http://127.0.0.1:8000/devtools/oopif/resources/error.html Error 'Error from error.html':2:8
Revealing iframe source

Clearing console
Current messages: