Implement new strategy for default 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];
   var appsPromo = $('apps-promo');
@@ skipping 19 matching lines @@
       addClosedMenuEntryWithLink(apps.menu, apps.createClosedMenuElement(app));
     });
 
     if (!(shownSections & MINIMIZED_APPS)) {
       appsSection.classList.remove('disabled');
     }
   }
   addClosedMenuFooter(apps.menu, 'apps', MINIMIZED_APPS, Section.APPS);
 
   apps.loaded = true;
+  if (data.showPromo)
+    document.documentElement.classList.add('apps-promo-visible');
+  else
+    document.documentElement.classList.remove('apps-promo-visible');
   maybeDoneLoading();
 
   if (data.apps.length > 0 && isDoneLoading()) {
     updateMiniviewClipping(appsMiniview);
     layoutSections();
   }
 }
 
 function appsPrefChangeCallback(data) {
   // Currently the only pref that is watched is the launch type.
@@ skipping 232 matching lines @@
       var elm = createElement({
         'id': 'web-store-entry',
         'name': localStrings.getString('web_store_title'),
         'launch_url': localStrings.getString('web_store_url')
       });
       elm.setAttribute('app-id', 'web-store-entry');
       return elm;
     }
   };
 })();