text: // Copyright 2014 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 EXTENSIONS_BROWSER_EXTENSION_PREF_STORE_H_
  #define EXTENSIONS_BROWSER_EXTENSION_PREF_STORE_H_
  
  #include <string>
  
  #include "base/macros.h"
  #include "components/prefs/value_map_pref_store.h"
  #include "extensions/browser/extension_pref_value_map.h"
  
  // A (non-persistent) PrefStore implementation that holds effective preferences
  // set by extensions. These preferences are managed by and fetched from an
  // ExtensionPrefValueMap.
  class ExtensionPrefStore : public ValueMapPrefStore,
                             public ExtensionPrefValueMap::Observer {
   public:
    // Constructs an ExtensionPrefStore for a regular or an incognito profile.
    ExtensionPrefStore(ExtensionPrefValueMap* extension_pref_value_map,
                       bool incognito_pref_store);
  
    // Overrides for ExtensionPrefValueMap::Observer:
    void OnInitializationCompleted() override;
    void OnPrefValueChanged(const std::string& key) override;
    void OnExtensionPrefValueMapDestruction() override;
  
   protected:
    ~ExtensionPrefStore() override;
  
   private:
    ExtensionPrefValueMap* extension_pref_value_map_;  // Weak pointer.
    bool incognito_pref_store_;
  
    DISALLOW_COPY_AND_ASSIGN(ExtensionPrefStore);
  };
  
  #endif  // EXTENSIONS_BROWSER_EXTENSION_PREF_STORE_H_
  