<!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
    <style>
		#scroller {
			position: relative;
			overflow-y: scroll;
			width: 300px;
			height: 300px;
			border: 1px solid black;
		}

		.negative {
			position: relative;
			z-index: 1;
			margin: 20px;
		    width: 200px;
		    height: 200px;
		    background-color: green;
		}

        .spacer {
            height: 1000px;
            width: 10px;
            background-color: silver;
        }
    </style>
    <script>
        if (window.testRunner)
            testRunner.waitUntilDone();

        window.addEventListener('load', () => {
            setTimeout(() => {
                scroller.scrollTo(0, 300);
                if (window.testRunner)
                    testRunner.notifyDone();
            }, 0)
        }, false);
    </script>
</head>
<body>
	<div id="scroller">
        <div class="negative box"></div>
        <div class="spacer"></div>
	</div>
</body>
</html>