chrome/browser/resources/extensions/runtime_host_permissions.html

<style include="cr-shared-style action-link md-select shared-style">
  iron-icon {
    --iron-icon-height: var(--cr-icon-size);
    --iron-icon-width: var(--cr-icon-size);
  }

  #section-heading {
    align-items: center;
    display: flex;
    justify-content: space-between;
  }

  #host-access {
    margin-inline-start: 20px;
    width: 100%;
  }

  #hosts {
    margin-bottom: 0;
    padding: 0;
  }

  #hosts li {
    align-items: center;
    border-bottom: var(--cr-separator-line);
    display: flex;
    height: var(--cr-section-min-height);
    justify-content: space-between;
  }

  #hosts li:last-child {
    border-bottom: none;
  }

  #add-host {
    font-weight: 500;
    width: 100%;
  }

  #permissions-mode {
    color: var(--cr-primary-text-color);
    margin-top: 12px;
  }

  cr-radio-button.multi-row {
    align-items: normal;
  }

  cr-icon-button {
    margin: 0;
  }
</style>
<div id="permissions-mode">
  <div id="section-heading">
    <span>$i18n{hostPermissionsHeading}</span>
    <a class="link-icon-button" aria-label="$i18n{learnMore}"
        href="$i18n{hostPermissionsLearnMoreLink}" target="_blank">
      <iron-icon icon="cr:help-outline"></iron-icon>
    </a>
  </div>
  <cr-radio-group id="host-access" selected="[[permissions.hostAccess]]"
      on-selected-changed="onHostAccessChange_">
    <cr-radio-button name="[[HostAccess_.ON_CLICK]]">
      $i18n{hostAccessOnClick}
    </cr-radio-button>
    <cr-radio-button name="[[HostAccess_.ON_SPECIFIC_SITES]]"
        class="multi-row">
      <div>
        $i18n{hostAccessOnSpecificSites}
      </div>
      <template is="dom-if" if="[[showSpecificSites_(permissions.*)]]">
        <ul id="hosts">
          <template is="dom-repeat"
              items="[[getRuntimeHosts_(permissions.hosts)]]">
            <li>
              <div>[[item]]</div>
              <cr-icon-button class="icon-more-vert edit-host"
                  on-click="onEditHostClick_"
                  title="$i18n{hostPermissionsEdit}"></cr-icon-button>
            </li>
          </template>
          <li>
            <a id="add-host" is="action-link" on-click="onAddHostClick_">
              $i18n{itemSiteAccessAddHost}
            </a>
          </li>
        </ul>
      </template>
    </cr-radio-button>
    <cr-radio-button name="[[HostAccess_.ON_ALL_SITES]]">
      $i18n{hostAccessOnAllSites}
    </cr-radio-button>
  </cr-radio-group>
</div>
<cr-action-menu id="hostActionMenu"
    role-description="$i18n{menu}"
    on-close="onActionMenuClose_">
  <button class="dropdown-item" id="action-menu-edit"
      on-click="onActionMenuEditClick_">
    $i18n{hostPermissionsEdit}
  </button>
  <button class="dropdown-item" id="action-menu-remove"
      on-click="onActionMenuRemoveClick_">
    $i18n{remove}
  </button>
</cr-action-menu>
<template is="dom-if" if="[[showHostDialog_]]" restamp>
  <extensions-runtime-hosts-dialog
      delegate="[[delegate]]" item-id="[[itemId]]"
      current-site="[[hostDialogModel_]]"
      update-host-access="[[dialogShouldUpdateHostAccess_(oldHostAccess_)]]"
      on-close="onHostDialogClose_"
      on-cancel="onHostDialogCancel_">
  </extensions-runtime-hosts-dialog>
</template>