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chromium/third_party/blink/web_tests/external/wpt/html/editing/dnd/platform/drag-link-manual.html 

<!doctype html>
<html>
  <head>
    <title>Dragging vs selecting links</title>
  </head>
  <body>

    <p><a href="">Test link, test link, test link, test link, test link, test link, test link, test link, test link</a></p>
    <p>Drag the test link above. When dragging vertically, it should drag the link. When dragging horizontally, it should select the text within the link.</p>

  </body>
</html>