Sanitize PrefStore interface.

chrome/common/pref_store_base.h

-// Copyright (c) 2010 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_COMMON_PREF_STORE_BASE_H_
-#define CHROME_COMMON_PREF_STORE_BASE_H_
-#pragma once
-
-#include "base/observer_list.h"
-#include "chrome/common/pref_store.h"
-
-// Implements the observer-related bits of the PrefStore interface. This is
-// provided as a convenience for PrefStore implementations to derive from.
-class PrefStoreBase : public PrefStore {
- public:
-  virtual ~PrefStoreBase() {}
-
-  // Overriden from PrefStore.
-  virtual void AddObserver(ObserverInterface* observer);
-  virtual void RemoveObserver(ObserverInterface* observer);
-
- protected:
-  // Send a notification about a changed preference value.
-  virtual void NotifyPrefValueChanged(const std::string& key);
-
-  // Notify observers about initialization being complete.
-  virtual void NotifyInitializationCompleted();
-
- private:
-  ObserverList<ObserverInterface, true> observers_;
-};
-
-#endif  // CHROME_COMMON_PREF_STORE_BASE_H_