Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/external/wpt/html/editing/dnd/selection/156.xhtml 

<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Selection drag and drop between text inputs</title>
</head>
<body onload="document.querySelector('input').select()">
<p>Drag selected text to the blue box. Selected text should be moved to the blue box once you drop it there.</p>
<p><input value="Drag me"/></p>
<p><input placeholder="Drop selection here"/></p>
</body>
</html>