chrome/browser/resources/chromeos/edu_login/edu_login_welcome.html

<style include="edu-login-css">
  .main-padding {
    display: flex;
    flex-direction: column;
    height: calc(100% - 90px);
  }

  .image-container {
    align-items: center;
    display: flex;
    flex-grow: 1;
    justify-content: center;
    width: 100%;
  }

  .welcome-image {
    height: 256px;
    width: 256px;
  }
</style>
<edu-login-template>
  <span slot="main">
    <div class="main-padding">
      <if expr="_google_chrome">
        <img class="google-logo"
            src="chrome://chrome-signin/googleg.svg" alt="">
      </if>
      <h1>[[getTitle_()]]</h1>
      <p>[[getBody_()]]</p>
      <div class="image-container">
        <img class="welcome-image" src="family_link_logo.svg" alt="">
      </div>
    </div>
  </span>
  <span slot="buttons">
    <edu-login-button button-type="ok">
    </edu-login-button>
  </span>
</edu-login-template>