Tests the Timeline API instrumentation of a script tag with an external script.

EvaluateScript Properties:
{
    data : {
    }
    endTime : <number>
    startTime : <number>
    type : "EvaluateScript"
}
EvaluateScript Properties:
{
    data : {
        columnNumber : 0
        frame : <string>
        lineNumber : 0
        url : .../devtools/tracing/timeline-js/resources/timeline-script-tag-2.js
    }
    endTime : <number>
    frameId : <string>
    startTime : <number>
    type : "EvaluateScript"
}