chrome/browser/resources/app_service_internals/app_service_internals.html

<h1>App Service Internals</h1>

<section>
  <h2>App List</h2>

  <template is="dom-repeat" items="[[appList_]]">
    <div>
      <h3>[[item.name]]</h3>
      <img src="chrome://app-icon/[[item.id]]/128">
      <pre>[[item.debugInfo]]</pre>
    </div>
  </template>
</section>