Revert of Move base/prefs to components/prefs

components/prefs/default_pref_store.h

Index: components/prefs/default_pref_store.h
diff --git a/components/prefs/default_pref_store.h b/components/prefs/default_pref_store.h
deleted file mode 100644
index ac5364d2bb166e407d4b3ca7671b499c79c4f85e..0000000000000000000000000000000000000000
--- a/components/prefs/default_pref_store.h
+++ /dev/null
@@ -1,53 +0,0 @@
-// 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 BASE_PREFS_DEFAULT_PREF_STORE_H_
-#define BASE_PREFS_DEFAULT_PREF_STORE_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "base/observer_list.h"
-#include "base/prefs/base_prefs_export.h"
-#include "base/prefs/pref_store.h"
-#include "base/prefs/pref_value_map.h"
-#include "base/values.h"
-
-// Used within a PrefRegistry to keep track of default preference values.
-class BASE_PREFS_EXPORT DefaultPrefStore : public PrefStore {
- public:
-  typedef PrefValueMap::const_iterator const_iterator;
-
-  DefaultPrefStore();
-
-  // PrefStore implementation:
-  bool GetValue(const std::string& key,
-                const base::Value** result) const override;
-  void AddObserver(PrefStore::Observer* observer) override;
-  void RemoveObserver(PrefStore::Observer* observer) override;
-  bool HasObservers() const override;
-
-  // Sets a |value| for |key|. Should only be called if a value has not been
-  // set yet; otherwise call ReplaceDefaultValue().
-  void SetDefaultValue(const std::string& key, scoped_ptr<base::Value> value);
-
-  // Replaces the the value for |key| with a new value. Should only be called
-  // if a value has alreday been set; otherwise call SetDefaultValue().
-  void ReplaceDefaultValue(const std::string& key,
-                           scoped_ptr<base::Value> value);
-
-  const_iterator begin() const;
-  const_iterator end() const;
-
- private:
-  ~DefaultPrefStore() override;
-
-  PrefValueMap prefs_;
-
-  base::ObserverList<PrefStore::Observer, true> observers_;
-
-  DISALLOW_COPY_AND_ASSIGN(DefaultPrefStore);
-};
-
-#endif  // BASE_PREFS_DEFAULT_PREF_STORE_H_