CONSOLE MESSAGE: line 23: First visit.
CONSOLE MESSAGE: line 17: Visited fragment and waited.
This test checks that interrupting a slow navigation with a fragment navigation will cancel the first navigation.

============== Back Forward List ==============
        http://127.0.0.1:8000/navigation/navigation-interrupted-by-fragment.html
curr->  http://127.0.0.1:8000/navigation/navigation-interrupted-by-fragment.html#abc
===============================================