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chromium/third_party/blink/web_tests/images/embed-image.html 

<!DOCTYPE html>
<html>
<head>
<script>
if (window.testRunner) {
    testRunner.waitUntilDone();
    testRunner.setPluginsEnabled(false);
}

function done()
{
    if (window.testRunner)
        testRunner.notifyDone();
}

window.onload = function() {
    var elem = document.createElement("embed");
    elem.onload = done;
    elem.type = "image/png";
    elem.src = "resources/oval.png";
    document.body.appendChild(elem);
};
</script>
</head>
</html>