Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/prefs/chrome_pref_service_factory.h

+// 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.
+
+#ifndef CHROME_BROWSER_PREFS_CHROME_PREF_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_PREFS_CHROME_PREF_SERVICE_FACTORY_H_
+
+namespace base {
+class SequencedTaskRunner;
+}
+
+namespace policy {
+class PolicyService;
+}
+
+class FilePath;
+class PrefServiceSimple;
+class PrefServiceSyncable;
+class PrefStore;
+
+namespace chrome_prefs {
+
+// Factory methods that create and initialize a new instance of a
+// PrefService for Chrome with the applicable PrefStores. The
+// |pref_filename| points to the user preference file. This is the
+// usual way to create a new PrefService.
+// |extension_pref_store| is used as the source for extension-controlled
+// preferences and may be NULL.
+// |policy_service| is used as the source for mandatory or recommended
+// policies.
+// If |async| is true, asynchronous version is used.
+// Notifies using PREF_INITIALIZATION_COMPLETED in the end. Details is set to
+// the created PrefService or NULL if creation has failed. Note, it is
+// guaranteed that in asynchronous version initialization happens after this
+// function returned.
+
+PrefServiceSimple* CreateLocalState(
+    const FilePath& pref_filename,
+    base::SequencedTaskRunner* pref_io_task_runner,
+    policy::PolicyService* policy_service,
+    PrefStore* extension_prefs,
+    bool async);
+
+PrefServiceSyncable* CreateProfilePrefs(
+    const FilePath& pref_filename,
+    base::SequencedTaskRunner* pref_io_task_runner,
+    policy::PolicyService* policy_service,
+    PrefStore* extension_prefs,
+    bool async);
+
+}  // namespace chrome_prefs
+
+#endif  // CHROME_BROWSER_PREFS_CHROME_PREF_SERVICE_FACTORY_H_