chromium/third_party/blink/web_tests/editing/selection/4776665.html

<script>
if (window.testRunner)
     testRunner.waitUntilDone();

function runTest() {
    var frame = frames[0];
    var doc = frame.document;
    var body = doc.body;
    var sel = frame.getSelection();
    sel.collapse(body, 0);
    if (window.testRunner)
        testRunner.notifyDone();
}
</script>
<p>This tests for a caret painting bug.  You should not see a caret in the editable subframe below.</p>
<iframe src="../resources/contenteditable-iframe-src.html" onload="runTest();"></iframe>