LayoutTests/svg/custom/js-late-gradient-creation.svg

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1 Basic//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-basic.dtd">  
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="svg-root" width="100%" height="100%" viewBox="0 0 480 360" onload="runRepaintTest()">
<script xlink:href="../../fast/repaint/resources/repaint.js"/>
<g id="content" transform="scale(1, 1.5)">
     <text font-size="68" fill="url(#dynGrad)"  x="20" y="70">Gradient on fill</text>
</g>
<script>
    var content = document.getElementById("content");

    function repaintTest() {
        if (window.testRunner)
            testRunner.waitUntilDone();
        setTimeout(createGradient, 0);
    }

    function createGradient()
    {
        var gradient = document.createElementNS("http://www.w3.org/2000/svg", "linearGradient");
        gradient.setAttribute("id", "dynGrad");
        gradient.setAttribute("x1", "0");
        gradient.setAttribute("x2", "1");

        var stop1 = document.createElementNS("http://www.w3.org/2000/svg", "stop");
        stop1.setAttribute("stop-color", "blue");
        stop1.setAttribute("offset", "0");

        var stop2 = document.createElementNS("http://www.w3.org/2000/svg", "stop");
        stop2.setAttribute("stop-color", "red");
        stop2.setAttribute("offset", "1");

        gradient.appendChild(stop1);
        gradient.appendChild(stop2);

        content.appendChild(gradient);

        if (window.testRunner)
            testRunner.notifyDone();
    }
</script>

</svg>