Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/prefs/pref_service_simple.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_PREF_SERVICE_SIMPLE_H_
+#define CHROME_BROWSER_PREFS_PREF_SERVICE_SIMPLE_H_
+
+#include "chrome/browser/prefs/pref_service.h"
+
+// A simple PrefService implementation.
+class PrefServiceSimple : public PrefService {
+ public:
+  // You may wish to use PrefServiceBuilder or one of its subclasses
+  // for simplified construction.
+  PrefServiceSimple(
+      PrefNotifierImpl* pref_notifier,
+      PrefValueStore* pref_value_store,
+      PersistentPrefStore* user_prefs,
+      DefaultPrefStore* default_store,
+      base::Callback<void(PersistentPrefStore::PrefReadError)>
+          read_error_callback,
+      bool async);
+  virtual ~PrefServiceSimple();
+
+  void RegisterBooleanPref(const char* path, bool default_value);
+  void RegisterIntegerPref(const char* path, int default_value);
+  void RegisterDoublePref(const char* path, double default_value);
+  void RegisterStringPref(const char* path, const std::string& default_value);
+  void RegisterFilePathPref(const char* path, const FilePath& default_value);
+  void RegisterListPref(const char* path);
+  void RegisterDictionaryPref(const char* path);
+  void RegisterListPref(const char* path, base::ListValue* default_value);
+  void RegisterDictionaryPref(
+      const char* path, base::DictionaryValue* default_value);
+  void RegisterInt64Pref(const char* path,
+                         int64 default_value);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PrefServiceSimple);
+};
+
+#endif  // CHROME_BROWSER_PREFS_PREF_SERVICE_SIMPLE_H_