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chromium/third_party/blink/web_tests/external/wpt/html/editing/dnd/selection/113.xhtml 

<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>RTL text selection drag and drop between textareas</title>
<style type="text/css">
textarea
  {width:300px;
  height:100px;
  margin-top:20px;
  padding:10px;}
</style>
</head>
<body onload="var t = document.querySelector('textarea');t.select();t.setSelectionRange(0,11)">
<p>Drag selected text to the textarea. Selected text should be moved to the textarea once you drop it there. Text direction should be preserved during drag and drop.</p>
<p><textarea>&#x202E;FAIL|SSAP&#x202C;</textarea></p>
<p><textarea dir="rtl" placeholder="Drop selection here"/></p>
</body>
</html>