chrome/browser/resources/settings/controls/settings_idle_load.html

<link rel="import" href="chrome://resources/html/polymer.html">

<link rel="import" href="chrome://resources/html/assert.html">
<link rel="import" href="../ensure_lazy_loaded.html">

<dom-module id="settings-idle-load">
  <template>
    <slot></slot>
  </template>
  <script src="settings_idle_load.js"></script>
</dom-module>