<html>
    <head>
        <script>
        function startTest() {
            if (window.testRunner) {
                testRunner.waitUntilDone();
                testRunner.setBackingScaleFactor(2, finishTest);
            }
        }

        function finishTest() {
            setTimeout(function() { testRunner.notifyDone(); }, 0);
        }
        </script>
    </head>
    <body onload="startTest();">
        <div style="-webkit-transform:scale(1.5); -webkit-transform-origin:top left;">
            <div style="height:300px;width:300px;background-image:-webkit-repeating-linear-gradient(top left, red 10%, blue 30%);border:1px solid">
            </div>
        </div>
    </body>
</html>