chrome/browser/resources/pdf/elements/viewer-progress-bar/viewer-progress-bar.html

<polymer-element name="viewer-progress-bar"
    attributes="progress text numSegments">
<template>
  <link rel="stylesheet" href="viewer-progress-bar.css">
  <div class="scaler">
    <ul id="segments"></ul>
    <div class="center-circle"></div>
  </div>
  <div id="text">{{text}}</div>
</template>
<script src="viewer-progress-bar.js"></script>
</polymer-element>