Revert of Move base/prefs to components/prefs

components/prefs/pref_value_map.h

Index: components/prefs/pref_value_map.h
diff --git a/components/prefs/pref_value_map.h b/components/prefs/pref_value_map.h
deleted file mode 100644
index 349fe6852010605cdfb7c174cb66cec03101695c..0000000000000000000000000000000000000000
--- a/components/prefs/pref_value_map.h
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright (c) 2011 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_PREF_VALUE_MAP_H_
-#define BASE_PREFS_PREF_VALUE_MAP_H_
-
-#include <string>
-#include <vector>
-
-#include "base/containers/scoped_ptr_hash_map.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/prefs/base_prefs_export.h"
-
-namespace base {
-class Value;
-}
-
-// A generic string to value map used by the PrefStore implementations.
-class BASE_PREFS_EXPORT PrefValueMap {
- public:
-  using Map = base::ScopedPtrHashMap<std::string, scoped_ptr<base::Value>>;
-  using iterator = Map::iterator;
-  using const_iterator = Map::const_iterator;
-
-  PrefValueMap();
-  virtual ~PrefValueMap();
-
-  // Gets the value for |key| and stores it in |value|. Ownership remains with
-  // the map. Returns true if a value is present. If not, |value| is not
-  // touched.
-  bool GetValue(const std::string& key, const base::Value** value) const;
-  bool GetValue(const std::string& key, base::Value** value);
-
-  // Sets a new |value| for |key|. |value| must be non-null. Returns true if the
-  // value changed.
-  bool SetValue(const std::string& key, scoped_ptr<base::Value> value);
-
-  // Removes the value for |key| from the map. Returns true if a value was
-  // removed.
-  bool RemoveValue(const std::string& key);
-
-  // Clears the map.
-  void Clear();
-
-  // Swaps the contents of two maps.
-  void Swap(PrefValueMap* other);
-
-  iterator begin();
-  iterator end();
-  const_iterator begin() const;
-  const_iterator end() const;
-
-  // Gets a boolean value for |key| and stores it in |value|. Returns true if
-  // the value was found and of the proper type.
-  bool GetBoolean(const std::string& key, bool* value) const;
-
-  // Sets the value for |key| to the boolean |value|.
-  void SetBoolean(const std::string& key, bool value);
-
-  // Gets a string value for |key| and stores it in |value|. Returns true if
-  // the value was found and of the proper type.
-  bool GetString(const std::string& key, std::string* value) const;
-
-  // Sets the value for |key| to the string |value|.
-  void SetString(const std::string& key, const std::string& value);
-
-  // Gets an int value for |key| and stores it in |value|. Returns true if
-  // the value was found and of the proper type.
-  bool GetInteger(const std::string& key, int* value) const;
-
-  // Sets the value for |key| to the int |value|.
-  void SetInteger(const std::string& key, const int value);
-
-  // Sets the value for |key| to the double |value|.
-  void SetDouble(const std::string& key, const double value);
-
-  // Compares this value map against |other| and stores all key names that have
-  // different values in |differing_keys|. This includes keys that are present
-  // only in one of the maps.
-  void GetDifferingKeys(const PrefValueMap* other,
-                        std::vector<std::string>* differing_keys) const;
-
- private:
-  Map prefs_;
-
-  DISALLOW_COPY_AND_ASSIGN(PrefValueMap);
-};
-
-#endif  // BASE_PREFS_PREF_VALUE_MAP_H_