Add <a is="action-link">, a web component extension of <a> for in-page actions.

chrome/browser/resources/print_preview/search/destination_search.css

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 #destination-search {
   z-index: 3;
 }
 
 #destination-search.transparent {
   opacity: 0;
@@ skipping 89 matching lines @@
 }
 
 #destination-search .cloudprint-promo {
   -webkit-box-align: center;
   -webkit-user-select: none;
   background-color: rgb(249, 237, 190);
   display: -webkit-box;
   padding: 12px;
 }
 
-#destination-search .cloudprint-promo .sign-in.link-button {
+#destination-search .cloudprint-promo .sign-in[is='action-link'] {
   padding: inherit;
 }
 
 #destination-search .cloudprint-promo .icon {
   -webkit-margin-end: 12px;
   display: block;
   height: 24px;
   width: 24px;
 }
 
@@ skipping 16 matching lines @@
   background-image: -webkit-image-set(
     url('chrome://theme/IDR_CLOSE_DIALOG_H') 1x,
     url('chrome://theme/IDR_CLOSE_DIALOG_H@2x') 2x);
 }
 
 #destination-search .cloudprint-promo .close-button:active {
   background-image: -webkit-image-set(
     url('chrome://theme/IDR_CLOSE_DIALOG_P') 1x,
     url('chrome://theme/IDR_CLOSE_DIALOG_P@2x') 2x);
 }