Fix scroll-bar behaviour.

remoting/webapp/remoting.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.
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /** @type {remoting.HostSession} */ remoting.hostSession = null;
@@ skipping 27 matching lines @@
 /**
  * Entry point for app initialization.
  */
 remoting.init = function() {
   // Determine whether or not this is a V2 web-app. In order to keep the apps
   // v2 patch as small as possible, all JS changes needed for apps v2 are done
   // at run-time. Only the manifest is patched.
   var manifest = chrome.runtime.getManifest();
   if (manifest && manifest.app && manifest.app.background) {
     remoting.isAppsV2 = true;
-    document.body.classList.add('apps-v2');
+    var htmlNode = /** @type {HTMLElement} */ (document.body.parentNode);
+    htmlNode.classList.add('apps-v2');
   }
 
   if (!remoting.isAppsV2) {
     migrateLocalToChromeStorage_();
   }
 
   remoting.logExtensionInfo_();
   l10n.localize();
 
   // Create global objects.
@@ skipping 398 matching lines @@
 /**
  * Generate a nonce, to be used as an xsrf protection token.
  *
  * @return {string} A URL-Safe Base64-encoded 128-bit random value. */
 remoting.generateXsrfToken = function() {
   var random = new Uint8Array(16);
   window.crypto.getRandomValues(random);
   var base64Token = window.btoa(String.fromCharCode.apply(null, random));
   return base64Token.replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '');
 };