Mark Chrome OS default apps as WAS_INSTALLED_BY_DEFAULT.

chrome/browser/extensions/external_provider_impl.cc

 // 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.
 
 #include "chrome/browser/extensions/external_provider_impl.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
@@ skipping 315 matching lines @@
 #endif
 
   bool is_chromeos_demo_session = false;
   int bundled_extension_creation_flags = Extension::NO_FLAGS;
 #if defined(OS_CHROMEOS)
   chromeos::UserManager* user_manager = chromeos::UserManager::Get();
   is_chromeos_demo_session =
       user_manager && user_manager->IsLoggedInAsDemoUser() &&
       g_browser_process->browser_policy_connector()->GetDeviceMode() ==
           policy::DEVICE_MODE_KIOSK;
-  bundled_extension_creation_flags = Extension::FROM_WEBSTORE;
+  bundled_extension_creation_flags = Extension::FROM_WEBSTORE |
+      Extension::WAS_INSTALLED_BY_DEFAULT;
 #endif
 
   if (!is_chromeos_demo_session) {
     provider_list->push_back(
         linked_ptr<ExternalProviderInterface>(
             new ExternalProviderImpl(
                 service,
                 new ExternalPrefLoader(chrome::DIR_EXTERNAL_EXTENSIONS,
                                        check_admin_permissions_on_mac),
                 Extension::EXTERNAL_PREF,
@@ skipping 72 matching lines @@
               service,
               connector->GetAppPackUpdater()->CreateExternalLoader(),
               Extension::EXTERNAL_PREF,
               Extension::INVALID,
               Extension::NO_FLAGS)));
   }
 #endif
 }
 
 }  // namespace extensions