Clean up pref change notification handling.

chrome/browser/prefs/dummy_pref_store.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_BROWSER_PREFS_DUMMY_PREF_STORE_H_
-#define CHROME_BROWSER_PREFS_DUMMY_PREF_STORE_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "base/scoped_ptr.h"
-#include "chrome/common/pref_store.h"
-
-class DictionaryValue;
-
-// |DummyPrefStore| is a stub implementation of the |PrefStore| interface.
-// It allows to get and set the state of the |PrefStore|.
-class DummyPrefStore : public PrefStore {
- public:
-  DummyPrefStore();
-  virtual ~DummyPrefStore() {}
-
-  virtual DictionaryValue* prefs() const { return prefs_.get(); }
-
-  virtual PrefStore::PrefReadError ReadPrefs();
-
-  virtual bool ReadOnly() { return read_only_; }
-
-  virtual bool WritePrefs();
-
-  // Getter and Setter methods for setting and getting the state of the
-  // |DummyPrefStore|.
-  virtual void set_read_only(bool read_only) { read_only_ = read_only; }
-  virtual void set_prefs(DictionaryValue* prefs) { prefs_.reset(prefs); }
-  virtual void set_prefs_written(bool status) { prefs_written_ = status; }
-  virtual bool get_prefs_written() { return prefs_written_; }
-
- private:
-  scoped_ptr<DictionaryValue> prefs_;
-
-  // Flag that indicates if the PrefStore is read-only
-  bool read_only_;
-
-  // Flag that indicates if the method WritePrefs was called.
-  bool prefs_written_;
-
-  DISALLOW_COPY_AND_ASSIGN(DummyPrefStore);
-};
-
-#endif  // CHROME_BROWSER_PREFS_DUMMY_PREF_STORE_H_