<html id="html">
<script>
if (window.layoutTestController)
     layoutTestController.dumpEditingCallbacks();
</script>

<body contenteditable="true">VisiblePositions created at [html, x] where html is non-editable should descend into an editable body, for convenience.  Everything on this page should be selected.
<script>
document.execCommand("SelectAll");
</script>
</body></html>