chromium/chrome/test/data/extensions/api_test/automation/sites/line_start_offsets.html

<!--
Copyright 2016 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<!DOCTYPE html>
<html>
  <head>
    <title>Automation Tests - Line Start Offsets</title>
    <meta charset="utf-8">
  </head>
  <body>
    <input type="text" value="Line one.">
    <textarea>
Line one.
Line two.
Line three.</textarea>
  </body>
</html>