Fix default apps losing the "bookmark app" bit once they get updated.

chrome/browser/extensions/external_extension_provider_impl.cc

 // Copyright (c) 2011 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_extension_provider_impl.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
@@ skipping 219 matching lines @@
 }
 
 void ExternalExtensionProviderImpl::ServiceShutdown() {
   service_ = NULL;
 }
 
 bool ExternalExtensionProviderImpl::IsReady() const {
   return ready_;
 }
 
+int ExternalExtensionProviderImpl::GetCreationFlags() const {
+  return creation_flags_;
+}
+
 bool ExternalExtensionProviderImpl::HasExtension(
     const std::string& id) const {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   CHECK(prefs_.get());
   CHECK(ready_);
   return prefs_->HasKey(id);
 }
 
 bool ExternalExtensionProviderImpl::GetExtensionDetails(
     const std::string& id, Extension::Location* location,
@@ skipping 112 matching lines @@
               profile,
               service,
               new ExternalPrefExtensionLoader(
                   chrome::DIR_DEFAULT_APPS,
                   ExternalPrefExtensionLoader::NONE),
               Extension::EXTERNAL_PREF,
               Extension::INVALID,
               Extension::FROM_BOOKMARK)));
 #endif
 }