Tests Page.domContentEventFired is triggered before Page.loadEventFired for a blank page
[
    [0] : {
        method : Page.domContentEventFired
        params : {
            timestamp : <number>
        }
        sessionId : <string>
    }
    [1] : {
        method : Page.loadEventFired
        params : {
            timestamp : <number>
        }
        sessionId : <string>
    }
]