Allow undefined data param to <appview>.connect

chrome/renderer/resources/extensions/app_view.js

 // Copyright 2014 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.
 
 var DocumentNatives = requireNative('document_natives');
 var GuestViewInternal =
     require('binding').Binding.create('guestViewInternal').generate();
 var IdGenerator = requireNative('id_generator');
 
 function AppViewInternal(appviewNode) {
@@ skipping 24 matching lines @@
   // We create BrowserPlugin as a custom element in order to observe changes
   // to attributes synchronously.
   var browserPluginNode = new AppViewInternal.BrowserPlugin();
   privates(browserPluginNode).internal = this;
   return browserPluginNode;
 };
 
 AppViewInternal.prototype.connect = function(app, data, callback) {
   var createParams = {
     'appId': app,
-    'data': data
+    'data': data || {}
   };
   var self = this;
   GuestViewInternal.createGuest(
     'appview',
     createParams,
     function(instanceId) {
       if (!instanceId) {
         self.browserPluginNode.style.visibility = 'hidden';
         var errorMsg = 'Unable to connect to app "' + app + '".';
         window.console.warn(errorMsg);
@@ skipping 68 matching lines @@
 
 var useCapture = true;
 window.addEventListener('readystatechange', function listener(event) {
   if (document.readyState == 'loading')
     return;
 
   registerBrowserPluginElement();
   registerAppViewElement();
   window.removeEventListener(event.type, listener, useCapture);
 }, useCapture);