NTP: Don't show any sections or layout until we receive mv and apps.

chrome/browser/resources/ntp/apps.js

 // Copyright (c) 2010 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 getAppsCallback(data) {
   logEvent('received apps');
   var appsSection = $('apps');
   var appsSectionContent = $('apps-maxiview');
   var appsMiniview = appsSection.getElementsByClassName('miniview')[0];
   appsSectionContent.textContent = '';
   appsMiniview.textContent = '';
 
   if (data.apps.length == 0) {
     appsSection.classList.add('disabled');
     setShownSections(Section.THUMB);
-    return;
+  } else {
+    data.apps.forEach(function(app) {
+        appsSectionContent.appendChild(apps.createElement(app));
+    });
+
+    appsSectionContent.appendChild(apps.createWebStoreElement());
+
+    data.apps.slice(0, MAX_MINIVIEW_ITEMS).forEach(function(app) {
+      appsMiniview.appendChild(apps.createMiniviewElement(app));
+    });
+
+    appsSection.classList.remove('disabled');
   }
 
-  data.apps.forEach(function(app) {
-    appsSectionContent.appendChild(apps.createElement(app));
-  });
+  apps.loaded = true;
+  maybeDoneLoading();
 
-  appsSectionContent.appendChild(apps.createWebStoreElement());
-
-  data.apps.slice(0, MAX_MINIVIEW_ITEMS).forEach(function(app) {
-    appsMiniview.appendChild(apps.createMiniviewElement(app));
-  });
-
-  appsSection.classList.remove('disabled');
-  updateMiniviewClipping(appsMiniview);
-  layoutSections();
+  if (data.apps.length > 0 && isDoneLoading()) {
+    updateMiniviewClipping(appsMiniview);
+    layoutSections();
+  }
 }
 
 var apps = (function() {
 
   function createElement(app) {
     var div = document.createElement('div');
     div.className = 'app';
 
     var a = div.appendChild(document.createElement('a'));
     a.setAttribute('app-id', app['id']);
@@ skipping 94 matching lines @@
         e.canExecute = currentApp && currentApp['options_url'];
         break;
       case 'apps-launch-command':
       case 'apps-uninstall-command':
         e.canExecute = true;
         break;
     }
   });
 
   return {
+    loaded: false,
+
     createElement: function(app) {
       var div = createElement(app);
       var a = div.firstChild;
 
       a.onclick = handleClick;
       a.style.backgroundImage = url(app['icon_big']);
       if (hashParams['app-id'] == app['id']) {
         div.setAttribute('new', 'new');
         // Delay changing the attribute a bit to let the page settle down a bit.
         setTimeout(function() {
@@ skipping 35 matching lines @@
 
     createWebStoreElement: function() {
       return createElement({
         'id': 'web-store-entry',
         'name': localStrings.getString('web_store_title'),
         'launch_url': localStrings.getString('web_store_url')
       });
     }
   };
 })();