l to window.performance.clearMeasures(\"" + measureName3 + "\"), where \"" + measureName3 +
                      "\" is a non-existent measure, window.performance.getEntriesByName(\"" + measureName1 + "\") " +
                      "returns an object containing the \"" + measureName1 + "\" measure.");

            // test that "measure2" still exists
            entries = window.performance.getEntriesByName(measureName2);
            test_true(entries[0].name == measureName2,
                      "After a