e(measureName1);
            pass = true;
            for (var i in entries)
            {
                pass = false;
            }
            test_true(pass,
                      "After a call to window.performance.clearMeasures(\"" + measureName1 + "\"), " +
                      "window.performance.getEntriesByName(\"" + measureName1 + "\") returns an empty object.");

            // test that "measure2" still exists
            entries = window.performance.getEntriesByName(measureName2);
          