Move PrefRegistrySimple to use unique_ptr<Value>

components/prefs/pref_registry_simple.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_PREF_REGISTRY_SIMPLE_H_
 #define COMPONENTS_PREFS_PREF_REGISTRY_SIMPLE_H_
 
 #include <stdint.h>
 
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "components/prefs/base_prefs_export.h"
 #include "components/prefs/pref_registry.h"
 
 namespace base {
 class DictionaryValue;
 class FilePath;
 class ListValue;
 }
 
 // A simple implementation of PrefRegistry.
 class COMPONENTS_PREFS_EXPORT PrefRegistrySimple : public PrefRegistry {
  public:
   PrefRegistrySimple();
 
   void RegisterBooleanPref(const std::string& path, bool default_value);
   void RegisterIntegerPref(const std::string& path, int default_value);
   void RegisterDoublePref(const std::string& path, double default_value);
   void RegisterStringPref(const std::string& path,
                           const std::string& default_value);
   void RegisterFilePathPref(const std::string& path,
                             const base::FilePath& default_value);
   void RegisterListPref(const std::string& path);
   void RegisterDictionaryPref(const std::string& path);
   void RegisterListPref(const std::string& path,
-                        base::ListValue* default_value);
-  void RegisterDictionaryPref(const std::string& path,
-                              base::DictionaryValue* default_value);
+                        std::unique_ptr<base::ListValue> default_value);
+  void RegisterDictionaryPref(
+      const std::string& path,
+      std::unique_ptr<base::DictionaryValue> default_value);
   void RegisterInt64Pref(const std::string& path, int64_t default_value);
   void RegisterUint64Pref(const std::string&, uint64_t default_value);
 
   // Versions of registration functions that accept PrefRegistrationFlags.
   // |flags| is a bitmask of PrefRegistrationFlags.
   void RegisterBooleanPref(const std::string&,
                            bool default_value,
                            uint32_t flags);
   void RegisterIntegerPref(const std::string&,
                            int default_value,
                            uint32_t flags);
   void RegisterDoublePref(const std::string&,
                           double default_value,
                           uint32_t flags);
   void RegisterStringPref(const std::string&,
                           const std::string& default_value,
                           uint32_t flags);
   void RegisterFilePathPref(const std::string&,
                             const base::FilePath& default_value,
                             uint32_t flags);
   void RegisterListPref(const std::string&, uint32_t flags);
   void RegisterDictionaryPref(const std::string&, uint32_t flags);
   void RegisterListPref(const std::string&,
-                        base::ListValue* default_value,
+                        std::unique_ptr<base::ListValue> default_value,
                         uint32_t flags);
-  void RegisterDictionaryPref(const std::string&,
-                              base::DictionaryValue* default_value,
-                              uint32_t flags);
+  void RegisterDictionaryPref(
+      const std::string&,
+      std::unique_ptr<base::DictionaryValue> default_value,
+      uint32_t flags);
   void RegisterInt64Pref(const std::string&,
                          int64_t default_value,
                          uint32_t flags);
   void RegisterUint64Pref(const std::string&,
                           uint64_t default_value,
                           uint32_t flags);
 
  protected:
   ~PrefRegistrySimple() override;
 
   // Allows subclasses to hook into pref registration.
   virtual void OnPrefRegistered(const std::string&,
                                 base::Value* default_value,
                                 uint32_t flags);
 
  private:
   void RegisterPrefAndNotify(const std::string&,
-                             base::Value* default_value,
+                             std::unique_ptr<base::Value> default_value,
                              uint32_t flags);
 
   DISALLOW_COPY_AND_ASSIGN(PrefRegistrySimple);
 };
 
 #endif  // COMPONENTS_PREFS_PREF_REGISTRY_SIMPLE_H_