Move PrefRegistrySimple to use unique_ptr<Value>

components/prefs/pref_registry_simple.cc

 // 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.
 
 #include "components/prefs/pref_registry_simple.h"
 
+#include <utility>
+
 #include "base/files/file_path.h"
+#include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 
 PrefRegistrySimple::PrefRegistrySimple() {
 }
 
 PrefRegistrySimple::~PrefRegistrySimple() {
 }
 
 void PrefRegistrySimple::RegisterBooleanPref(const std::string& path,
                                              bool default_value) {
-  RegisterPrefAndNotify(path, new base::Value(default_value),
+  RegisterPrefAndNotify(path, base::MakeUnique<base::Value>(default_value),
                         NO_REGISTRATION_FLAGS);
 }
 
 void PrefRegistrySimple::RegisterIntegerPref(const std::string& path,
                                              int default_value) {
-  RegisterPrefAndNotify(path, new base::Value(default_value),
+  RegisterPrefAndNotify(path, base::MakeUnique<base::Value>(default_value),
                         NO_REGISTRATION_FLAGS);
 }
 
 void PrefRegistrySimple::RegisterDoublePref(const std::string& path,
                                             double default_value) {
-  RegisterPrefAndNotify(path, new base::Value(default_value),
+  RegisterPrefAndNotify(path, base::MakeUnique<base::Value>(default_value),
                         NO_REGISTRATION_FLAGS);
 }
 
 void PrefRegistrySimple::RegisterStringPref(const std::string& path,
                                             const std::string& default_value) {
-  RegisterPrefAndNotify(path, new base::Value(default_value),
+  RegisterPrefAndNotify(path, base::MakeUnique<base::Value>(default_value),
                         NO_REGISTRATION_FLAGS);
 }
 
 void PrefRegistrySimple::RegisterFilePathPref(
     const std::string& path,
     const base::FilePath& default_value) {
-  RegisterPrefAndNotify(path, new base::Value(default_value.value()),
+  RegisterPrefAndNotify(path,
+                        base::MakeUnique<base::Value>(default_value.value()),
                         NO_REGISTRATION_FLAGS);
 }
 
 void PrefRegistrySimple::RegisterListPref(const std::string& path) {
-  RegisterPrefAndNotify(path, new base::ListValue(), NO_REGISTRATION_FLAGS);
+  RegisterPrefAndNotify(path, base::MakeUnique<base::ListValue>(),
+                        NO_REGISTRATION_FLAGS);
 }
 
-void PrefRegistrySimple::RegisterListPref(const std::string& path,
-                                          base::ListValue* default_value) {
-  RegisterPrefAndNotify(path, default_value, NO_REGISTRATION_FLAGS);
+void PrefRegistrySimple::RegisterListPref(
+    const std::string& path,
+    std::unique_ptr<base::ListValue> default_value) {
+  RegisterPrefAndNotify(path, std::move(default_value), NO_REGISTRATION_FLAGS);
 }
 
 void PrefRegistrySimple::RegisterDictionaryPref(const std::string& path) {
-  RegisterPrefAndNotify(path, new base::DictionaryValue(),
+  RegisterPrefAndNotify(path, base::MakeUnique<base::DictionaryValue>(),
                         NO_REGISTRATION_FLAGS);
 }
 
 void PrefRegistrySimple::RegisterDictionaryPref(
     const std::string& path,
-    base::DictionaryValue* default_value) {
-  RegisterPrefAndNotify(path, default_value, NO_REGISTRATION_FLAGS);
+    std::unique_ptr<base::DictionaryValue> default_value) {
+  RegisterPrefAndNotify(path, std::move(default_value), NO_REGISTRATION_FLAGS);
 }
 
 void PrefRegistrySimple::RegisterInt64Pref(const std::string& path,
                                            int64_t default_value) {
-  RegisterPrefAndNotify(path,
-                        new base::Value(base::Int64ToString(default_value)),
-                        NO_REGISTRATION_FLAGS);
+  RegisterPrefAndNotify(
+      path, base::MakeUnique<base::Value>(base::Int64ToString(default_value)),
+      NO_REGISTRATION_FLAGS);
 }
 
 void PrefRegistrySimple::RegisterUint64Pref(const std::string& path,
                                             uint64_t default_value) {
-  RegisterPrefAndNotify(path,
-                        new base::Value(base::Uint64ToString(default_value)),
-                        NO_REGISTRATION_FLAGS);
+  RegisterPrefAndNotify(
+      path, base::MakeUnique<base::Value>(base::Uint64ToString(default_value)),
+      NO_REGISTRATION_FLAGS);
 }
 
 void PrefRegistrySimple::RegisterBooleanPref(const std::string& path,
                                              bool default_value,
                                              uint32_t flags) {
-  RegisterPrefAndNotify(path, new base::Value(default_value), flags);
+  RegisterPrefAndNotify(path, base::MakeUnique<base::Value>(default_value),
+                        flags);
 }
 
 void PrefRegistrySimple::RegisterIntegerPref(const std::string& path,
                                              int default_value,
                                              uint32_t flags) {
-  RegisterPrefAndNotify(path, new base::Value(default_value), flags);
+  RegisterPrefAndNotify(path, base::MakeUnique<base::Value>(default_value),
+                        flags);
 }
 
 void PrefRegistrySimple::RegisterDoublePref(const std::string& path,
                                             double default_value,
                                             uint32_t flags) {
-  RegisterPrefAndNotify(path, new base::Value(default_value), flags);
+  RegisterPrefAndNotify(path, base::MakeUnique<base::Value>(default_value),
+                        flags);
 }
 
 void PrefRegistrySimple::RegisterStringPref(const std::string& path,
                                             const std::string& default_value,
                                             uint32_t flags) {
-  RegisterPrefAndNotify(path, new base::Value(default_value), flags);
+  RegisterPrefAndNotify(path, base::MakeUnique<base::Value>(default_value),
+                        flags);
 }
 
 void PrefRegistrySimple::RegisterFilePathPref(
     const std::string& path,
     const base::FilePath& default_value,
     uint32_t flags) {
-  RegisterPrefAndNotify(path, new base::Value(default_value.value()), flags);
+  RegisterPrefAndNotify(
+      path, base::MakeUnique<base::Value>(default_value.value()), flags);
 }
 
 void PrefRegistrySimple::RegisterListPref(const std::string& path,
                                           uint32_t flags) {
-  RegisterPrefAndNotify(path, new base::ListValue(), flags);
+  RegisterPrefAndNotify(path, base::MakeUnique<base::ListValue>(), flags);
 }
 
-void PrefRegistrySimple::RegisterListPref(const std::string& path,
-                                          base::ListValue* default_value,
-                                          uint32_t flags) {
-  RegisterPrefAndNotify(path, default_value, flags);
+void PrefRegistrySimple::RegisterListPref(
+    const std::string& path,
+    std::unique_ptr<base::ListValue> default_value,
+    uint32_t flags) {
+  RegisterPrefAndNotify(path, std::move(default_value), flags);
 }
 
 void PrefRegistrySimple::RegisterDictionaryPref(const std::string& path,
                                                 uint32_t flags) {
-  RegisterPrefAndNotify(path, new base::DictionaryValue(), flags);
+  RegisterPrefAndNotify(path, base::MakeUnique<base::DictionaryValue>(), flags);
 }
 
 void PrefRegistrySimple::RegisterDictionaryPref(
     const std::string& path,
-    base::DictionaryValue* default_value,
+    std::unique_ptr<base::DictionaryValue> default_value,
     uint32_t flags) {
-  RegisterPrefAndNotify(path, default_value, flags);
+  RegisterPrefAndNotify(path, std::move(default_value), flags);
 }
 
 void PrefRegistrySimple::RegisterInt64Pref(const std::string& path,
                                            int64_t default_value,
                                            uint32_t flags) {
   RegisterPrefAndNotify(
-      path, new base::Value(base::Int64ToString(default_value)), flags);
+      path, base::MakeUnique<base::Value>(base::Int64ToString(default_value)),
+      flags);
 }
 
 void PrefRegistrySimple::RegisterUint64Pref(const std::string& path,
                                             uint64_t default_value,
                                             uint32_t flags) {
   RegisterPrefAndNotify(
-      path, new base::Value(base::Uint64ToString(default_value)), flags);
+      path, base::MakeUnique<base::Value>(base::Uint64ToString(default_value)),
+      flags);
 }
 
 void PrefRegistrySimple::OnPrefRegistered(const std::string& path,
                                           base::Value* default_value,
                                           uint32_t flags) {}
 
-void PrefRegistrySimple::RegisterPrefAndNotify(const std::string& path,
-                                               base::Value* default_value,
-                                               uint32_t flags) {
-  RegisterPreference(path, default_value, flags);
-  OnPrefRegistered(path, default_value, flags);
+void PrefRegistrySimple::RegisterPrefAndNotify(
+    const std::string& path,
+    std::unique_ptr<base::Value> default_value,
+    uint32_t flags) {
+  base::Value* default_value_weak = default_value.get();
+  RegisterPreference(path, std::move(default_value), flags);
+  OnPrefRegistered(path, default_value_weak, flags);
 }