Start sending auxclick instead of click for non-primary buttons

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 4
  * This is the main code for a previous version of the Chrome NTP ("NTP4").
  * Some parts of this are still used for the chrome://apps page.
  */
 
@@ skipping 86 matching lines @@
 
     if (!loadTimeData.getBoolean('showWebStoreIcon')) {
       var webStoreIcon = $('chrome-web-store-link');
       // Not all versions of the NTP have a footer, so this may not exist.
       if (webStoreIcon)
         webStoreIcon.hidden = true;
     } else {
       var webStoreLink = loadTimeData.getString('webStoreLink');
       var url = appendParam(webStoreLink, 'utm_source', 'chrome-ntp-launcher');
       $('chrome-web-store-link').href = url;
+      $('chrome-web-store-link').addEventListener('auxclick',
+          onChromeWebStoreButtonClick);
       $('chrome-web-store-link').addEventListener('click',
           onChromeWebStoreButtonClick);
     }
 
     // We need to wait for all the footer menu setup to be completed before
     // we can compute its layout.
     layoutFooter();
 
     if (loadTimeData.getString('login_status_message')) {
       loginBubble = new cr.ui.Bubble;
@@ skipping 31 matching lines @@
       cr.dispatchSimpleEvent(document, 'ntpLoaded', true, true);
       document.documentElement.classList.remove('starting-up');
 
       startTime = Date.now();
     });
   }
 
   /**
    * Launches the chrome web store app with the chrome-ntp-launcher
    * source.
-   * @param {Event} e The click event.
+   * @param {Event} e The click/auxclick event.
    */
   function onChromeWebStoreButtonClick(e) {
     chrome.send('recordAppLaunchByURL',
                 [encodeURIComponent(this.href),
                  ntp.APP_LAUNCH.NTP_WEBSTORE_FOOTER]);
   }
 
   /**
    * The number of sections to wait on.
    * @type {number}
@@ skipping 277 matching lines @@
     setBookmarkBarAttached: setBookmarkBarAttached,
     setFaviconDominantColor: setFaviconDominantColor,
     themeChanged: themeChanged,
     updateLogin: updateLogin
   };
 });
 
 document.addEventListener('DOMContentLoaded', ntp.onLoad);
 
 var toCssPx = cr.ui.toCssPx;