chromium/third_party/blink/web_tests/dom/mutation-event-tests/media/video-controls-with-mutation-event-handler.html

<!DOCTYPE html>
<html>
    <head>
        <title>&lt;video&gt; controls with mutation event handler</title>

        <style type="text/css" media="screen">
            body { background: #cccccc; }
            video { background: yellow; border: 1px solid black; border-bottom: none; }
        </style>

        <script>
            function runTest()
            {
                if (window.testRunner)
                    testRunner.dumpAsText();

                document.body.addEventListener("DOMSubtreeModified", function () { }, false);

                var video = document.createElement('video');
                video.setAttribute('id', 'vid');
                video.setAttribute('width', '320');
                video.setAttribute('height', '240');
                video.setAttribute('autoplay', '');
                video.setAttribute('controls', '');
                var paragraph = document.createElement('p');
                paragraph.appendChild(video);
                document.body.appendChild(paragraph);

                paragraph = document.createElement('p');
                paragraph.appendChild(document.createTextNode("SUCCESS: The test ran without crashing"));
                document.body.appendChild(paragraph);
            }
        </script>
    </head>

    <body onload="runTest()">
        <p>This tests that we don't crash while creating a video element while a DOMSubtreeModified even handler is registered.</p>
        <p>If you can see the movie below, the test passed.</p>
    </body>
</html>