Tests the Timeline API instrumentation of a DOM Dispatch (mousedown)

EventDispatch Properties:
{
    data : {
        stackTrace : <object>
        type : "mouseover"
    }
    endTime : <number>
    stackTrace : <object>
    startTime : <number>
    type : "EventDispatch"
}
Text details for EventDispatch: mouseover
EventDispatch Properties:
{
    data : {
        stackTrace : <object>
        type : "mousemove"
    }
    endTime : <number>
    stackTrace : <object>
    startTime : <number>
    type : "EventDispatch"
}
Text details for EventDispatch: mousemove
EventDispatch Properties:
{
    data : {
        stackTrace : <object>
        type : "mousedown"
    }
    endTime : <number>
    stackTrace : <object>
    startTime : <number>
    type : "EventDispatch"
}
Text details for EventDispatch: mousedown
EventDispatch Properties:
{
    data : {
        stackTrace : <object>
        type : "selectstart"
    }
    endTime : <number>
    stackTrace : <object>
    startTime : <number>
    type : "EventDispatch"
}
Text details for EventDispatch: selectstart
EventDispatch Properties:
{
    data : {
        type : "selectionchange"
    }
    endTime : <number>
    startTime : <number>
    type : "EventDispatch"
}
Text details for EventDispatch: selectionchange