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

chrome/browser/resources/history/history.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. */
 
 html[dir='rtl'] body.uber-frame > .page {
   -webkit-margin-end: 0;
 }
 
 body.uber-frame > .page.big-topbar-page {
   padding-top: 78px;
@@ skipping 488 matching lines @@
   height: 15px;
   min-width: 15px;
   visibility: hidden;
 }
 
 .entry .starred {
   visibility: visible;
 }
 
 .entry .title > a,
-.site-domain .link-button {
+.site-domain [is='action-link'] {
   color: rgb(48, 57, 66);
   margin: 2px;
   padding: 2px;
   /* Focus outlines are rendered differently for each platform. */
 <if expr="is_macosx">
   margin: 4px;
   padding: 0;
 </if>
 <if expr="is_win">
   padding: 0 2px;
@@ skipping 102 matching lines @@
   background-image: url(../../../../ui/webui/resources/images/phone_small.png);
   background-position: 14px center;
   padding-left: 43px;
 }
 
 #action-menu[data-devicetype='tablet']::before {
   background-image: url(../../../../ui/webui/resources/images/tablet_small.png);
   background-position: 17px center;
   padding-left: 49px;
 }