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

chrome/browser/resources/ntp4/new_tab.js

 // 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.
 
 /**
  * @fileoverview New tab page
  * This is the main code for the new tab page used by touch-enabled Chrome
  * browsers.  For now this is still a prototype.
  */
 
@@ skipping 281 matching lines @@
         }, 60000);
         chrome.send('notificationPromoViewed');
       }
 
       cr.dispatchSimpleEvent(document, 'ntpLoaded', true, true);
       document.documentElement.classList.remove('starting-up');
 
       startTime = Date.now();
     });
 
-    preventDefaultOnPoundLinkClicks();  // From webui/js/util.js.
     cr.ui.FocusManager.disableMouseFocusOnButtons();
   }
 
   /**
    * Launches the chrome web store app with the chrome-ntp-launcher
    * source.
    * @param {Event} e The click event.
    */
   function onChromeWebStoreButtonClick(e) {
     chrome.send('recordAppLaunchByURL',
@@ skipping 143 matching lines @@
     if (typeof message == 'string') {
       span.textContent = message;
     } else {
       span.textContent = '';  // Remove all children.
       span.appendChild(message);
     }
 
     var linksBin = $('notificationLinks');
     linksBin.textContent = '';
     for (var i = 0; i < links.length; i++) {
-      var link = linksBin.ownerDocument.createElement('div');
+      var link = linksBin.ownerDocument.createElement('a', 'action-link');
       link.textContent = links[i].text;
       link.action = links[i].action;
       link.onclick = function() {
         this.action();
         hideNotification();
       };
-      link.setAttribute('role', 'button');
-      link.setAttribute('tabindex', 0);
-      link.className = 'link-button';
       linksBin.appendChild(link);
     }
 
     function closeFunc(e) {
       if (opt_closeHandler)
         opt_closeHandler();
       hideNotification();
     }
 
     document.querySelector('#notification button').onclick = closeFunc;
@@ skipping 301 matching lines @@
     setFaviconDominantColor: setFaviconDominantColor,
     showNotification: showNotification,
     themeChanged: themeChanged,
     updateLogin: updateLogin
   };
 });
 
 document.addEventListener('DOMContentLoaded', ntp.onLoad);
 
 var toCssPx = cr.ui.toCssPx;