chromium/chrome/browser/resources/chromeos/multidevice_internals/browser_tabs_metadata_form.html

<style include="cr-shared-style shared-style">
  :host {
    display: flex;
    flex: 1 0 100%;
  }

  :host(:not([is-valid])) {
    background-color: LightGray;
  }

  :host([is-valid]) {
    background-color: LightGreen;
   }

  #faviconSelector {
    align-items: normal;
  }
</style>

<div class="column">
  <cr-input value="{{url_}}" id="urlInput" auto-validate required label="URL: "
      error-message="This row is invalid">
  </cr-input>
</div>
<div class="column">
  <cr-input value="{{title_}}" label="Title:" auto-validate required
      error-message="This row is invalid">
  </cr-input>
</div>
<div class="column">
  <cr-input value="{{lastAccessedTimeStamp_}}" label="Last Accessed (ms):"
      id="lastAccessedTimeStampInput" type="number" min="0"
      on-change="onLastAccessTimeStampChanged_"
      auto-validate error-message="Must be greater than 0" required>
  </cr-input>
</div>
<div class="column" id="faviconSelector">
  <label>Favicon Image Type</label>
  <select id="faviconList" class="md-select"
      on-change="onFaviconSelected_">
    <template is="dom-repeat" items="[[faviconList_]]">
      <option selected="[[isEqual_(item, favicon_)]]">
        [[getImageTypeName_(item)]]
      </option>
    </template>
  </select>
</div>