chromium/chrome/browser/resources/chromeos/password_change/password_change.html

<style>
  :host {
    height: 100%;
    left: 0;
    margin: 0;
    padding: 0;
    position: fixed;
    top: 0;
    width: 100%;
  }

  #body {
    align-self: stretch;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    height: 100%;
    width: 100%;
  }

  #samlContainer {
    /* #F1F3F4 */
    background: rgb(241, 243, 244);
    /* #000000 */
    box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.17);
    display: flex;
    height: 44px;
    justify-content: flex-end;
    text-align: center;
  }

  #samlNoticeMessage {
      /* #6a6a6a */
    color: rgb(106, 106, 106);
    flex: 1;
    font-size: 13px;
    padding-top: 15px;
  }

  #samlCloseButton {
    --cr-icon-button-margin-end: 0;
    --cr-icon-button-margin-start: 0;
  }

  #signinFrame {
    flex: 1;
    height: 100%;
    width: 100%;
  }
</style>
<div id="body">
  <div id="samlContainer">
    <div id="samlNoticeMessage">[[i18n('hostedHeader')]]</div>
    <cr-icon-button id="samlCloseButton" iron-icon="cr:close"
        on-click="onCloseTap_">
    </cr-icon-button>
  </div>
  <webview id="signinFrame" name="signinFrame" allowscaling></webview>
</div>