llEvent = false;
        var cancelable = undefined;
        var bubbles = undefined;

        function resetValues() {
            didGetScrollEvent = false;
            cancelable = undefined;
            bubbles = undefined;
        }

        addManualTestStep(
            function() {
                window.visualViewport.addEventListener('scroll', function(e) {
                    didGetScrollEvent = true;
                    cancelable = e.cancelable;
                    bubbles = e.bubbles;
        