LayoutTests/editing/pasteboard/displaced-generic-placeholder.html

<script>
if (window.testRunner)
     testRunner.dumpEditingCallbacks();
</script>
<p>This is a test to make sure that a placeholder, even one that doesn't have our special class on it, is removed when it is displaced by pasted content.</p>
<div id="test" contenteditable="true"><br></div>

<script>
var s = window.getSelection();
var e = document.getElementById("test");

s.setPosition(e, 0);
document.execCommand("InsertHTML", false, "First paragraph.<div>Second paragraph.</div>");
</script>