Remove base::Value::CreateNullValue

chrome/browser/ui/webui/options/certificate_manager_handler.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/ui/webui/options/certificate_manager_handler.h"
 
 #include <errno.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 1177 matching lines @@
                                            args);
   }
 }
 
 void CertificateManagerHandler::ShowError(const std::string& title,
                                           const std::string& error) const {
   auto title_value = base::MakeUnique<base::Value>(title);
   auto error_value = base::MakeUnique<base::Value>(error);
   auto ok_title_value =
       base::MakeUnique<base::Value>(l10n_util::GetStringUTF8(IDS_OK));
-  auto cancel_title_value = base::Value::CreateNullValue();
-  auto ok_callback_value = base::Value::CreateNullValue();
-  auto cancel_callback_value = base::Value::CreateNullValue();
+  auto cancel_title_value = base::MakeUnique<base::Value>();
+  auto ok_callback_value = base::MakeUnique<base::Value>();
+  auto cancel_callback_value = base::MakeUnique<base::Value>();
   std::vector<const base::Value*> args = {
       title_value.get(),       error_value.get(),
       ok_title_value.get(),    cancel_title_value.get(),
       ok_callback_value.get(), cancel_callback_value.get()};
   web_ui()->CallJavascriptFunctionUnsafe("AlertOverlay.show", args);
 }
 
 void CertificateManagerHandler::ShowImportErrors(
     const std::string& title,
     const net::NSSCertDatabase::ImportCertFailureList& not_imported) const {
@@ skipping 20 matching lines @@
   web_ui()->CallJavascriptFunctionUnsafe("CertificateImportErrorOverlay.show",
                                          title_value, error_value,
                                          cert_error_list);
 }
 
 gfx::NativeWindow CertificateManagerHandler::GetParentWindow() const {
   return web_ui()->GetWebContents()->GetTopLevelNativeWindow();
 }
 
 }  // namespace options