Remove base::Value::CreateNullValue

chrome/browser/ui/webui/print_preview/print_preview_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/print_preview/print_preview_handler.h"
 
 #include <ctype.h>
 #include <stddef.h>
 
 #include <map>
@@ skipping 1293 matching lines @@
   web_ui()->CallJavascriptFunctionUnsafe("updateWithPrinterCapabilities",
                                          *settings_info);
 }
 
 void PrintPreviewHandler::SendPrinterSetup(
     const std::string& callback_id,
     const std::string& printer_name,
     std::unique_ptr<base::DictionaryValue> destination_info) {
   auto response = base::MakeUnique<base::DictionaryValue>();
   bool success = true;
-  auto caps_value = base::Value::CreateNullValue();
+  auto caps_value = base::MakeUnique<base::Value>();
   auto caps = base::MakeUnique<base::DictionaryValue>();
   if (destination_info &&
       destination_info->Remove(printing::kPrinterCapabilities, &caps_value) &&
       caps_value->IsType(base::Value::Type::DICTIONARY)) {
     caps = base::DictionaryValue::From(std::move(caps_value));
   } else {
     LOG(WARNING) << "Printer setup failed";
     success = false;
   }
 
@@ skipping 469 matching lines @@
 
 void PrintPreviewHandler::UnregisterForGaiaCookieChanges() {
   if (gaia_cookie_manager_service_)
     gaia_cookie_manager_service_->RemoveObserver(this);
 }
 
 void PrintPreviewHandler::SetPdfSavedClosureForTesting(
     const base::Closure& closure) {
   pdf_file_saved_closure_ = closure;
 }