chrome/browser/resources/chromeos/first_run/first_step.html

<div class="step" id="first-step">
  <h2>
    Quickly open favorite apps from the Shelf.
  </h2>
  <p>
    We've pinned some apps we think you'll use often.
  </p>
  <p>
    Browse the web <br>
    Check your email <br>
    Edit docs and sheets <br>
    Make presentations <br>
    Listen to music <br>
    ...and more. <br>
    </p>
    <div class="controls">
      <button class="next-button custom-appearance">
        Next
      </button>
    </div>
</div>