Remove base::Value::CreateNullValue

chrome/browser/chromeos/policy/configuration_policy_handler_chromeos.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 "chrome/browser/chromeos/policy/configuration_policy_handler_chromeos.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
@@ skipping 248 matching lines @@
 }
 
 void NetworkConfigurationPolicyHandler::PrepareForDisplaying(
     PolicyMap* policies) const {
   const PolicyMap::Entry* entry = policies->Get(policy_name());
   if (!entry)
     return;
   std::unique_ptr<base::Value> sanitized_config =
       SanitizeNetworkConfig(entry->value.get());
   if (!sanitized_config)
-    sanitized_config = base::Value::CreateNullValue();
+    sanitized_config = base::MakeUnique<base::Value>();
 
   policies->Set(policy_name(), entry->level, entry->scope, entry->source,
                 std::move(sanitized_config), nullptr);
 }
 
 NetworkConfigurationPolicyHandler::NetworkConfigurationPolicyHandler(
     const char* policy_name,
     onc::ONCSource onc_source,
     const char* pref_path)
     : TypeCheckingPolicyHandler(policy_name, base::Value::Type::STRING),
@@ skipping 196 matching lines @@
 
   value = GetValue(dict, kScreenLockDelayAC);
   if (value)
     prefs->SetValue(prefs::kPowerAcScreenLockDelayMs, std::move(value));
   value = GetValue(dict, kScreenLockDelayBattery);
   if (value)
     prefs->SetValue(prefs::kPowerBatteryScreenLockDelayMs, std::move(value));
 }
 
 }  // namespace policy