chromium/components/prefs/overlay_user_pref_store.h

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_PREFS_OVERLAY_USER_PREF_STORE_H_
#define COMPONENTS_PREFS_OVERLAY_USER_PREF_STORE_H_

#include <stdint.h>

#include <map>
#include <string_view>

#include "base/memory/ref_counted.h"
#include "base/observer_list.h"
#include "base/values.h"
#include "components/prefs/persistent_pref_store.h"
#include "components/prefs/pref_name_set.h"
#include "components/prefs/pref_value_map.h"
#include "components/prefs/prefs_export.h"

// PersistentPrefStore that directs all write operations into an in-memory
// PrefValueMap. Read operations are first answered by the PrefValueMap.
// If the PrefValueMap does not contain a value for the requested key,
// the look-up is passed on to an underlying PersistentPrefStore
// |persistent_user_pref_store_|.
class COMPONENTS_PREFS_EXPORT OverlayUserPrefStore
    : public PersistentPrefStore { … };

#endif  // COMPONENTS_PREFS_OVERLAY_USER_PREF_STORE_H_