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

chrome/browser/resources/history/other_devices.js

 // Copyright (c) 2013 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.
 
 /**
  * @fileoverview The section of the history page that shows tabs from sessions
                  on other devices.
  */
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 276 matching lines @@
                                                      String(win.sessionId),
                                                      String(tab.sessionId)));
         contents.appendChild(a);
       } else {
         numTabsHidden++;
       }
     }
   }
 
   if (numTabsHidden > 0) {
-    var moreLinkButton = createElementWithClassName('button',
-        'device-show-more-tabs link-button');
-    moreLinkButton.addEventListener('click', this.view_.increaseRowHeight.bind(
+    var moreLink = document.createElement('a', 'action-link');
+    moreLink.classList.add('device-show-more-tabs');
+    moreLink.addEventListener('click', this.view_.increaseRowHeight.bind(
         this.view_, this.row_, numTabsHidden));
-    var xMore = loadTimeData.getString('xMore');
-    moreLinkButton.appendChild(
-        document.createTextNode(xMore.replace('$1', numTabsHidden)));
-    contents.appendChild(moreLinkButton);
+    moreLink.textContent = loadTimeData.getStringF('xMore', numTabsHidden);
+    contents.appendChild(moreLink);
   }
 
   return contents;
 };
 
 /**
  * Add child text nodes to a node such that occurrences of this.searchText_ are
  * highlighted.
  * @param {Node} node The node under which new text nodes will be made as
  *     children.
@@ skipping 236 matching lines @@
 
   var doSearch = function(e) {
     devicesView.setSearchText($('search-field').value);
   };
   $('search-field').addEventListener('search', doSearch);
   $('search-button').addEventListener('click', doSearch);
 }
 
 // Add handlers to HTML elements.
 document.addEventListener('DOMContentLoaded', load);