Remove base::Value::CreateNullValue

extensions/browser/api/socket/socket_api.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 "extensions/browser/api/socket/socket_api.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 344 matching lines @@
   EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(0, &socket_id_));
   return true;
 }
 
 void SocketDisconnectFunction::Work() {
   Socket* socket = GetSocket(socket_id_);
   if (socket)
     socket->Disconnect(false /* socket_destroying */);
   else
     error_ = kSocketNotFoundError;
-  SetResult(base::Value::CreateNullValue());
+  SetResult(base::MakeUnique<base::Value>());
 }
 
 bool SocketBindFunction::Prepare() {
   EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(0, &socket_id_));
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(1, &address_));
   int port;
   EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(2, &port));
   if (!IsPortValid(port)) {
     error_ = kPortInvalidError;
     return false;
@@ skipping 713 matching lines @@
   } else {
     RemoveSocket(params_->socket_id);
     error_ = net::ErrorToString(result);
   }
 
   results_ = api::socket::Secure::Results::Create(result);
   AsyncWorkCompleted();
 }
 
 }  // namespace extensions