Tests that valid parsed script notifications are received by front-end. Bug 52721

Debugger was enabled.
script 1:
    start: 5:8
    end: 38:0
script 2:
    start: 38:21
    end: 42:0
script 3:
    start: 43:11
    end: 43:32
script 4:
    start: 44:11
    end: 45:0
script 5:
    start: 46:11
    end: 48:0
script 6:
    start: 51:56
    end: 52:2
Debugger was disabled.