Remove base::Value::CreateNullValue

chrome/browser/extensions/api/tabs/tabs_api.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/extensions/api/tabs/tabs_api.h"
 
 #include <stddef.h>
 #include <algorithm>
 #include <limits>
 #include <memory>
@@ skipping 640 matching lines @@
   else
     new_window->window()->ShowInactive();
 
   WindowController* controller = new_window->extension_window_controller();
 
   std::unique_ptr<base::Value> result;
   if (new_window->profile()->IsOffTheRecord() &&
       !browser_context()->IsOffTheRecord() && !include_incognito()) {
     // Don't expose incognito windows if extension itself works in non-incognito
     // profile and CanCrossIncognito isn't allowed.
-    result = base::Value::CreateNullValue();
+    result = base::MakeUnique<base::Value>();
   } else {
     result = controller->CreateWindowValueWithTabs(extension());
   }
 
   return RespondNow(OneArgument(std::move(result)));
 }
 
 ExtensionFunction::ResponseAction WindowsUpdateFunction::Run() {
   std::unique_ptr<windows::Update::Params> params(
       windows::Update::Params::Create(*args_));
@@ skipping 1464 matching lines @@
       params->tab_id
           ? ErrorUtils::FormatErrorMessage(keys::kCannotDiscardTab,
                                            base::IntToString(*params->tab_id))
           : keys::kCannotFindTabToDiscard));
 }
 
 TabsDiscardFunction::TabsDiscardFunction() {}
 TabsDiscardFunction::~TabsDiscardFunction() {}
 
 }  // namespace extensions