Tests top frame navigation events.


Navigating child frame 1
    FrameAdded : child1
    FrameNavigated : child1
    SecurityOriginAdded : http://frame/child1.html
Navigating child frame 1 to a different URL
    SecurityOriginRemoved : http://frame/child1.html
    FrameNavigated : child1
    SecurityOriginAdded : http://frame/child1-new.html
Navigating child frame 2
    FrameAdded : child2
    FrameNavigated : child2
    SecurityOriginAdded : http://frame/child2.html
Detaching child frame 1
    SecurityOriginRemoved : http://frame/child1-new.html
    FrameDetached : child1
Navigating root frame
    SecurityOriginRemoved : http://frame/child2.html
    SecurityOriginRemoved : http://frame/root1.html
    FrameDetached : child2
    FrameDetached : root1
    FrameAdded : root2
    FrameNavigated : root2
    MainFrameNavigated : root2
    SecurityOriginAdded : http://frame/root2.html