NTP: Use the store as the last thumbnail in case we have no apps installed....

chrome/browser/extensions/extensions_service.cc

 // 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.
 
 #include "chrome/browser/extensions/extensions_service.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/histogram.h"
@@ skipping 1122 matching lines @@
       // either fully working or not loaded at all, but never half-crashed.
       UnloadExtension(Details<ExtensionHost>(details).ptr()->extension()->id());
       break;
     }
 
     default:
       NOTREACHED() << "Unexpected notification type.";
   }
 }
 
+bool ExtensionsService::HasApps() {
+  if (!extensions_enabled_)
+    return false;
+
+  for (ExtensionList::const_iterator it = extensions_.begin();
+       it != extensions_.end(); ++it) {
+    if ((*it)->is_app())
+      return true;
+  }
+
+  return false;
+}
 
 // ExtensionsServicesBackend
 
 ExtensionsServiceBackend::ExtensionsServiceBackend(
     const FilePath& install_directory)
         : frontend_(NULL),
           install_directory_(install_directory),
           alert_on_error_(false) {
   // TODO(aa): This ends up doing blocking IO on the UI thread because it reads
   // pref data in the ctor and that is called on the UI thread. Would be better
@@ skipping 167 matching lines @@
   // Finish installing on UI thread.
   ChromeThread::PostTask(
       ChromeThread::UI, FROM_HERE,
       NewRunnableMethod(
           frontend_,
           &ExtensionsService::ContinueLoadAllExtensions,
           extensions_to_reload,
           start_time,
           true));
 }