Add PrefStore::GetValues

components/prefs/overlay_user_pref_store.h

 // 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 COMPONENTS_PREFS_OVERLAY_USER_PREF_STORE_H_
 #define COMPONENTS_PREFS_OVERLAY_USER_PREF_STORE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 20 matching lines @@
   // from the |underlay_|.
   virtual bool IsSetInOverlay(const std::string& key) const;
 
   // Methods of PrefStore.
   void AddObserver(PrefStore::Observer* observer) override;
   void RemoveObserver(PrefStore::Observer* observer) override;
   bool HasObservers() const override;
   bool IsInitializationComplete() const override;
   bool GetValue(const std::string& key,
                 const base::Value** result) const override;
+  std::unique_ptr<base::DictionaryValue> GetValues() const override;
 
   // Methods of PersistentPrefStore.
   bool GetMutableValue(const std::string& key, base::Value** result) override;
   void SetValue(const std::string& key,
                 std::unique_ptr<base::Value> value,
                 uint32_t flags) override;
   void SetValueSilently(const std::string& key,
                         std::unique_ptr<base::Value> value,
                         uint32_t flags) override;
   void RemoveValue(const std::string& key, uint32_t flags) override;
@@ skipping 31 matching lines @@
   base::ObserverList<PrefStore::Observer, true> observers_;
   PrefValueMap overlay_;
   scoped_refptr<PersistentPrefStore> underlay_;
   NamesMap overlay_to_underlay_names_map_;
   NamesMap underlay_to_overlay_names_map_;
 
   DISALLOW_COPY_AND_ASSIGN(OverlayUserPrefStore);
 };
 
 #endif  // COMPONENTS_PREFS_OVERLAY_USER_PREF_STORE_H_