Add PrefStore::GetValues

components/prefs/in_memory_pref_store.h

 // Copyright (c) 2016 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_IN_MEMORY_PREF_STORE_H_
 #define COMPONENTS_PREFS_IN_MEMORY_PREF_STORE_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "components/prefs/persistent_pref_store.h"
 #include "components/prefs/pref_value_map.h"
 
 // A light-weight prefstore implementation that keeps preferences
 // in a memory backed store. This is not a persistent prefstore -- we
 // subclass the PersistentPrefStore here since it is needed by the
 // PrefService, which in turn is needed by various components.
 class COMPONENTS_PREFS_EXPORT InMemoryPrefStore : public PersistentPrefStore {
  public:
   InMemoryPrefStore();
 
   // PrefStore implementation.
   bool GetValue(const std::string& key,
                 const base::Value** result) const override;
+  std::unique_ptr<base::DictionaryValue> GetValues() const override;
   void AddObserver(PrefStore::Observer* observer) override;
   void RemoveObserver(PrefStore::Observer* observer) override;
   bool HasObservers() const override;
   bool IsInitializationComplete() const override;
 
   // PersistentPrefStore implementation.
   bool GetMutableValue(const std::string& key, base::Value** result) override;
   void ReportValueChanged(const std::string& key, uint32_t flags) override;
   void SetValue(const std::string& key,
                 std::unique_ptr<base::Value> value,
@@ skipping 16 matching lines @@
  private:
   // Stores the preference values.
   PrefValueMap prefs_;
 
   base::ObserverList<PrefStore::Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(InMemoryPrefStore);
 };
 
 #endif  // COMPONENTS_PREFS_IN_MEMORY_PREF_STORE_H_