formance.clearMeasures() method is working properly. This test creates the
           following measures to test this method:
            <ul>
                <li>"measure1"</li>
                <li>"measure2"</li>
            </ul>
           After creating each measure, performance.clearMeasures() is called three times. First, it is provided with a
           name of "measureUndefined", a non-existent measure, which shouldn't change the state of the Performance
           Timeline. Next, it is provided wi