Remove base::Value::CreateNullValue

chrome/browser/ui/webui/settings/about_handler.cc

 // Copyright 2016 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/settings/about_handler.h"
 
 #include <stddef.h>
 
 #include <string>
 
 #include "ash/common/system/chromeos/devicetype_utils.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/i18n/message_formatter.h"
 #include "base/location.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/task_scheduler/post_task.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/obsolete_system/obsolete_system.h"
@@ skipping 537 matching lines @@
   event->SetString("message", message);
   event->SetInteger("progress", progress);
 
 #if defined(OS_CHROMEOS)
   if (status == VersionUpdater::FAILED_OFFLINE ||
       status == VersionUpdater::FAILED_CONNECTION_TYPE_DISALLOWED) {
     base::string16 types_msg = GetAllowedConnectionTypesMessage();
     if (!types_msg.empty())
       event->SetString("connectionTypes", types_msg);
     else
-      event->Set("connectionTypes", base::Value::CreateNullValue());
+      event->Set("connectionTypes", base::MakeUnique<base::Value>());
   } else {
-    event->Set("connectionTypes", base::Value::CreateNullValue());
+    event->Set("connectionTypes", base::MakeUnique<base::Value>());
   }
 #endif  // defined(OS_CHROMEOS)
 
   CallJavascriptFunction("cr.webUIListenerCallback",
                          base::Value("update-status-changed"), *event);
 }
 
 #if defined(OS_MACOSX)
 void AboutHandler::SetPromotionState(VersionUpdater::PromotionState state) {
   // Worth noting: PROMOTE_DISABLED indicates that promotion is possible,
@@ skipping 21 matching lines @@
   CallJavascriptFunction("cr.webUIListenerCallback",
                          base::Value("promotion-state-changed"), promo_state);
 }
 #endif  // defined(OS_MACOSX)
 
 #if defined(OS_CHROMEOS)
 void AboutHandler::OnRegulatoryLabelDirFound(
     std::string callback_id,
     const base::FilePath& label_dir_path) {
   if (label_dir_path.empty()) {
-    ResolveJavascriptCallback(base::Value(callback_id),
-                              *base::Value::CreateNullValue());
+    ResolveJavascriptCallback(base::Value(callback_id), base::Value());
     return;
   }
 
   base::PostTaskWithTraitsAndReplyWithResult(
       FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
                      base::TaskPriority::USER_VISIBLE),
       base::Bind(&ReadRegulatoryLabelText, label_dir_path),
       base::Bind(&AboutHandler::OnRegulatoryLabelTextRead,
                  weak_factory_.GetWeakPtr(), callback_id, label_dir_path));
 }
@@ skipping 11 matching lines @@
       label_dir_path.AppendASCII(kRegulatoryLabelImageFilename).MaybeAsASCII();
   std::string url =
       std::string("chrome://") + chrome::kChromeOSAssetHost + "/" + image_path;
   regulatory_info->SetString("url", url);
 
   ResolveJavascriptCallback(base::Value(callback_id), *regulatory_info);
 }
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace settings