Tests scripts panel file selectors.

Dumping ScriptsNavigator 'Scripts' tab:
  example.com
    ?a=b
  localhost
    LayoutTests/inspector/debugger/foo/bar
      script.js
      script.js?a=1
      script.js?a=2
    LayoutTests/inspector/debugger/foo/baz
      script.js
  ?a=b
  very_looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong_url
Dumping ScriptsNavigator 'Content scripts' tab:
  localhost
    LayoutTests/inspector/debugger/foo/bar
      contentScript.js?a=1
      contentScript.js?a=2
      contentScript2.js?a=1