chrome/browser/resources/sync_internals/about.html

<script src="chrome://sync-internals/about.js"></script>

<style>
div#aboutInfo {
  -webkit-columns: 3;
}

div#aboutInfo h2 {
  color: #4a8ee6;
  font-size: 100%;
  margin-bottom: 0;
}

div#aboutInfo .err {
  color: red;
}

div#aboutInfo div.section {
  display: inline-block;
  width: 100%;
  -webkit-column-break-inside: avoid;
}

table.aboutDetails {
  width: 100%;
}

table.aboutDetails tr:nth-child(odd) {
  background: #eff3ff;
}

div#aboutInfo div.section > td#detail {
  width: 50%;
}

div#aboutInfo div.section > td#value {
  width: 50%;
}

table#typeInfo tr.error {
 background: #ffcccc;
}

table#typeInfo tr.warning {
 background: #ffffcc;
}

table#typeInfo tr.ok {
 background: #ccffcc;
}

@-webkit-keyframes highlight1 {
  0% { background: #ffff00; }
  100% { background: #ffffff; }
}

@-webkit-keyframes highlight2 {
  0% { background: #9b9ea6; }
  100% { background: #eff3ff; }
}

table.aboutDetails tr[highlighted] {
  -webkit-animation-name: highlight1;
  -webkit-animation-duration: 3s;
  -webkit-animation-timing-function: linear;
}

table.aboutDetails tr[highlighted]:nth-child(odd) {
  -webkit-animation-name: highlight2;
  -webkit-animation-duration: 3s;
  -webkit-animation-timing-function: linear;
}

table.aboutDetails tr.uninitialized {
  color: #7f7f7f;
}

</style>

<div id='aboutInfo'>
  <div class="section" jsselect="details">
    <h2 jscontent="title"></h2>
    <table class="aboutDetails">
      <tr jsselect="data"
            jsvalues="class:$this.is_valid ? '' : 'uninitialized'"
            jseval='highlightIfChanged(this, this.children[1].innerText, stat_value)'>
        <td class="detail" jscontent="stat_name" width=50%></td>
        <td class="value" jscontent="stat_value" width=50%></td>
      </tr>
    </table>
  </div>

  <div class="section" style="overflow-x: auto">
    <h2>Type Info</h2>
    <table id="typeInfo">
      <tr jsselect="type_status" jsvalues="class:$this.status">
        <td jscontent="name" width=50%></td>
        <td jscontent="value" width=30%></td>
        <td jscontent="num_entries" width=10%></td>
        <td jscontent="num_live" width=10%></td>
      </tr>
    </table>
  </div>

  <div class="section" jsdisplay="unrecoverable_error_detected">
    <p>
      <span class="err" jscontent="unrecoverable_error_message"></span>
    </p>
  </div>

  <div class="section" jsdisplay="actionable_error_detected">
    <p>
      <h2>Actionable Error</h2>
      <table id="actionableError">
        <tr jsselect="actionable_error">
          <td jscontent="stat_name"></td>
          <td jscontent="stat_value"></td>
        </tr>
      </table>
    </p>
  </div>
</div>