chromium/third_party/blink/web_tests/fast/events/drag-and-drop-subframe-dataTransfer.html

<!DOCTYPE html>
<html>
<head>
<script>
function onDrop(evt) {
	document.body.innerHTML = 'PASS';
	if (!evt.dataTransfer.types) return;
	for (var i = 0, type; type = evt.dataTransfer.types[i]; i++) {
		clip = evt.dataTransfer.getData(type);
		if (typeof clip == 'string' && clip.indexOf('FAIL') != -1)
			document.body.innerHTML = 'FAIL';
	}
	evt.preventDefault();
	testRunner.notifyDone();
}

function runTest() {
	testRunner.dumpAsText();
	testRunner.waitUntilDone();
	var d = document.getElementById('drag');
	var o = document.getElementById('drop');
	eventSender.mouseMoveTo(d.offsetLeft + d.offsetWidth / 2, d.offsetTop + d.offsetHeight / 2);
	eventSender.mouseDown();
	eventSender.leapForward(100);
	eventSender.mouseMoveTo(o.offsetLeft + o.offsetWidth / 2, o.offsetTop + o.offsetHeight / 2);
	eventSender.mouseUp();
}

window.onload = function() {
	var d = document.getElementById('drag');
	var r = document.createRange();
	r.selectNode(d);
	getSelection().removeAllRanges();
	getSelection().addRange(r);
	document.getElementById('drop').addEventListener('drop', onDrop, true);
	window.addEventListener('dragover', function(x) { x.preventDefault() }, true);
	window.addEventListener('dragstart', function(x) { window.focus() }, true);

	if (window.testRunner)
		runTest();
}
</script>
</head>
<body>
Dragging this iframe onto a drop target should not expose its contents.
<div id="drag" style="-webkit-user-drag: element ">
&rarr;
<iframe src="resources/file-for-drag-and-drop-subframe-dataTransfer.html"></iframe>
&larr;
</div>
<input id="drop">
</body>
</html>