Change more base::ListValue methods to use std::unique_ptr.

chrome/browser/extensions/extension_management_test_util.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_management_test_util.h"
 
 #include <string>
 #include <utility>
 
+#include "base/memory/ptr_util.h"
 #include "components/crx_file/id_util.h"
 #include "components/policy/core/common/configuration_policy_provider.h"
 #include "components/policy/core/common/mock_configuration_policy_provider.h"
 #include "components/policy/core/common/policy_bundle.h"
 #include "components/policy/core/common/policy_map.h"
 #include "components/policy/core/common/policy_namespace.h"
 #include "components/policy/core/common/policy_types.h"
 #include "components/policy/policy_constants.h"
 
 namespace extensions {
@@ skipping 205 matching lines @@
 }
 
 void ExtensionManagementPrefUpdaterBase::AddStringToList(
     const std::string& path,
     const std::string& str) {
   base::ListValue* list_value = nullptr;
   if (!pref_->GetList(path, &list_value)) {
     list_value = new base::ListValue();
     pref_->Set(path, list_value);
   }
-  CHECK(list_value->AppendIfNotPresent(new base::StringValue(str)));
+  CHECK(
+      list_value->AppendIfNotPresent(base::MakeUnique<base::StringValue>(str)));
 }
 
 void ExtensionManagementPrefUpdaterBase::RemoveStringFromList(
     const std::string& path,
     const std::string& str) {
   base::ListValue* list_value = nullptr;
   if (pref_->GetList(path, &list_value))
     CHECK(list_value->Remove(base::StringValue(str), nullptr));
 }
 
@@ skipping 18 matching lines @@
   policies_
       ->Get(
           policy::PolicyNamespace(policy::POLICY_DOMAIN_CHROME, std::string()))
       .Set(policy::key::kExtensionSettings, policy::POLICY_LEVEL_MANDATORY,
            policy::POLICY_SCOPE_USER, policy::POLICY_SOURCE_CLOUD, TakePref(),
            nullptr);
   provider_->UpdatePolicy(std::move(policies_));
 }
 
 }  // namespace extensions