Extension Settings API: move the API functions into an object SettingsNamepace,

chrome/browser/extensions/settings/settings_leveldb_storage_unittest.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/settings/settings_storage_unittest.h"
 
+#include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/settings/settings_leveldb_storage.h"
 
 namespace extensions {
 
 namespace {
 
 SettingsStorage* Param(
     const FilePath& file_path, const std::string& extension_id) {
-  return SettingsLeveldbStorage::Factory().Create(file_path, extension_id);
+  return scoped_refptr<SettingsStorageFactory>(
+      new SettingsLeveldbStorage::Factory())->Create(file_path, extension_id);
 }
 
 }  // namespace
 
 INSTANTIATE_TEST_CASE_P(
     SettingsLeveldbStorage,
     ExtensionSettingsStorageTest,
     testing::Values(&Param));
 
 }  // namespace extensions