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chromium/chrome/test/data/android/url_overriding/subframe_navigation_child_top.html 

<head>
  <meta name="viewport"
    content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
</head>
<body>
  <a href='PARAM_SUBFRAME_URL' target='_top'>
    <div style='height:10000px; width:100%;'></div>
  </a>
  Click page to open App!!
</body>