Revert of Move base/prefs to components/prefs

components/prefs/value_map_pref_store.cc

-// 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.
-
-#include "base/prefs/value_map_pref_store.h"
-
-#include <algorithm>
-#include <utility>
-
-#include "base/stl_util.h"
-#include "base/values.h"
-
-ValueMapPrefStore::ValueMapPrefStore() {}
-
-bool ValueMapPrefStore::GetValue(const std::string& key,
-                                 const base::Value** value) const {
-  return prefs_.GetValue(key, value);
-}
-
-void ValueMapPrefStore::AddObserver(PrefStore::Observer* observer) {
-  observers_.AddObserver(observer);
-}
-
-void ValueMapPrefStore::RemoveObserver(PrefStore::Observer* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-bool ValueMapPrefStore::HasObservers() const {
-  return observers_.might_have_observers();
-}
-
-void ValueMapPrefStore::SetValue(const std::string& key,
-                                 scoped_ptr<base::Value> value,
-                                 uint32_t flags) {
-  if (prefs_.SetValue(key, std::move(value)))
-    FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(key));
-}
-
-void ValueMapPrefStore::RemoveValue(const std::string& key, uint32_t flags) {
-  if (prefs_.RemoveValue(key))
-    FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(key));
-}
-
-bool ValueMapPrefStore::GetMutableValue(const std::string& key,
-                                        base::Value** value) {
-  return prefs_.GetValue(key, value);
-}
-
-void ValueMapPrefStore::ReportValueChanged(const std::string& key,
-                                           uint32_t flags) {
-  FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(key));
-}
-
-void ValueMapPrefStore::SetValueSilently(const std::string& key,
-                                         scoped_ptr<base::Value> value,
-                                         uint32_t flags) {
-  prefs_.SetValue(key, std::move(value));
-}
-
-ValueMapPrefStore::~ValueMapPrefStore() {}
-
-void ValueMapPrefStore::NotifyInitializationCompleted() {
-  FOR_EACH_OBSERVER(Observer, observers_, OnInitializationCompleted(true));
-}