Remove "Report an Issue" button from chrome://chrome in chromium

chrome/browser/resources/help/help.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.
 
 <include src="../uber/uber_utils.js">
 
 cr.define('help', function() {
   /**
    * Encapsulated handling of the help page.
    */
@@ skipping 52 matching lines @@
             loadTimeData.getString('productOsLicense');
       }
 
       var productTOS = $('product-tos');
       if (productTOS)
         productTOS.innerHTML = loadTimeData.getString('productTOS');
 
       $('get-help').onclick = function() {
         chrome.send('openHelpPage');
       };
+<if expr="pp_ifdef('_google_chrome')">
       $('report-issue').onclick = function() {
         chrome.send('openFeedbackDialog');
       };
+</if>
 
       this.maybeSetOnClick_($('more-info-expander'),
           this.toggleMoreInfo_.bind(this));
 
       this.maybeSetOnClick_($('promote'), function() {
         chrome.send('promoteUpdater');
       });
       this.maybeSetOnClick_($('relaunch'), function() {
         chrome.send('relaunchNow');
       });
@@ skipping 447 matching lines @@
 });
 
 /**
  * onload listener to initialize the HelpPage.
  */
 window.onload = function() {
   help.HelpPage.getInstance().initialize();
   if (cr.isChromeOS)
     help.ChannelChangePage.getInstance().initialize();
 };