<!DOCTYPE html> <!-- webkit-test-runner [ useFlexibleViewport=true AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
    <meta name="viewport" content="width=device-width">
    <style>
        #scroller {
            height: 300px;
            width: 300px;
            overflow: scroll;
            -webkit-overflow-scrolling: touch;
        }
        
        .box {
            width: 100%;
            height: 100%;
        }
        
        .top {
            background-color: green;
        }

        .bottom {
            background-color: green;
        }
    </style>
</head>
<body>
    <div id="scroller">
        <div class="top box"></div>
        <div class="bottom box"></div>
    </div>
</body>
</html>