chrome/browser/resources/certificate_manager/certificate_subpage.html

<style include="cr-icons cr-shared-style">
  #header {
    align-items: center;
    display: grid;
    grid-template-columns: auto auto 1fr;
    margin-bottom: 28px;
  }

  #backButton {
    --cr-icon-button-margin-end: 10px;
    --cr-icon-button-margin-start: -10px;
  }

  certificate-list {
    padding: 20px 0;
  }
</style>

<div id="header" class="cr-row first">
  <cr-icon-button id="backButton" class="icon-arrow-back"
      aria-label$="[[i18n('certificateManagerV2SubpageBackButtonAriaLabel', subpageTitle)]]"
      aria-roledescription$="[[i18n('certificateManagerV2SubpageBackButtonAriaRoleDescription',subpageTitle)]]"
      on-click="onBackButtonClick_">
  </cr-icon-button>
  <h2 class="cr-title-text">[[subpageTitle]]</h2>
</div>
<template is="dom-repeat" items="[[subpageCertLists]]">
  <certificate-list
      cert-source="[[item.certSource]]"
      header-text="[[item.headerText]]"
      cert-metadata-editable="[[item.certMetadataEditable]]"
      hide-export="[[item.hideExport]]"
      show-import="[[item.showImport]]"
      show-import-and-bind="[[item.showImportAndBind]]"
      hide-if-empty="[[item.hideIfEmpty]]"
      hide-header="[[item.hideHeader]]"
      in-subpage>
  </certificate-list>
</template>