chromium/chrome/browser/resources/nearby_internals/nearby_internals.html

<style>
  :host {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
  }

  app-header {
    background-color: rgb(0, 134, 179);
    color: white;
    font-size: 200%;
    padding: 8px;
    text-align: center;
  }

  iron-pages {
    flex: 1;
    overflow: hidden;
  }

  iron-pages > * {
    display: block;
    height: 100%;
    overflow: auto;
  }
</style>
<app-header>
  <app-toolbar>Nearby Share Internals</app-toolbar>
</app-header>
<iron-location path="{{path_}}"></iron-location>
<cr-tabs selected="{{selectedTabIndex_}}" tab-names="[[tabNames_]]"></cr-tabs>
<iron-pages selected="[[selectedTabIndex_]]">
  <logging-tab feature="nearby-share"></logging-tab>
  <http-tab></http-tab>
  <contact-tab></contact-tab>
  <ui-trigger-tab></ui-trigger-tab>
  <logging-tab feature="quick-pair"></logging-tab>
</iron-pages>