CONSOLE MESSAGE: line 0: Application Cache update failed, because http://127.0.0.1:8000/inspector/appcache/resources/non-existing-file could not be fetched.
Tests that application cache model keeps track of manifest urls and statuses correctly when there is a non existing file listed in manifest.

Bug 64581
Dumping application cache tree:
    (empty)
Dumping application cache model:
    (empty)

Dumping application cache tree:
    (empty)
Dumping application cache model:
    (empty)