Offline interstitial mobile fixes

chrome/renderer/resources/neterror.js

 // Copyright 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.
 
 function toggleHelpBox() {
   var helpBoxOuter = document.getElementById('help-box-outer');
   helpBoxOuter.classList.toggle('hidden');
   var detailsButton = document.getElementById('details-button');
   if (helpBoxOuter.classList.contains('hidden'))
     detailsButton.innerText = detailsButton.detailsText;
@@ skipping 117 matching lines @@
   }
 
   if (reloadButton.style.display == 'none' &&
       staleLoadButton.style.display == 'none') {
     detailsButton.classList.add('singular');
   }
 
   if (templateData) {
     // Hide the details button if there are no details to show.
     if (templateData.summary && !templateData.summary.msg) {
-      detailsButton.hidden = true;
+      detailsButton.style.display = 'none';
       document.getElementById('help-box-outer').style.display = 'block';
     }
 
     // Show control buttons.
     if (templateData.reloadButton && templateData.reloadButton.msg ||
         templateData.staleLoadButton && templateData.staleLoadButton.msg) {
       controlButtonDiv.hidden = false;
     }
   }
 }
 
 document.addEventListener('DOMContentLoaded', setButtonLayout);