Use constexpr TaskTraits constructor in chrome.

chrome/browser/ui/webui/options/chromeos/storage_manager_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/options/chromeos/storage_manager_handler.h"
 
 #include <algorithm>
 #include <numeric>
 #include <string>
 
@@ skipping 194 matching lines @@
 }
 
 void StorageManagerHandler::UpdateSizeStat() {
   Profile* const profile = Profile::FromWebUI(web_ui());
   const base::FilePath downloads_path =
      file_manager::util::GetDownloadsFolderForProfile(profile);
 
   int64_t* total_size = new int64_t(0);
   int64_t* available_size = new int64_t(0);
   base::PostTaskWithTraitsAndReply(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::BACKGROUND),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&GetSizeStatAsync, downloads_path, total_size, available_size),
       base::Bind(&StorageManagerHandler::OnGetSizeStat,
                  weak_ptr_factory_.GetWeakPtr(), base::Owned(total_size),
                  base::Owned(available_size)));
 }
 
 void StorageManagerHandler::OnGetSizeStat(int64_t* total_size,
                                           int64_t* available_size) {
   int64_t used_size = *total_size - *available_size;
   base::DictionaryValue size_stat;
@@ skipping 16 matching lines @@
 void StorageManagerHandler::UpdateDownloadsSize() {
   if (updating_downloads_size_)
     return;
   updating_downloads_size_ = true;
 
   Profile* const profile = Profile::FromWebUI(web_ui());
   const base::FilePath downloads_path =
       file_manager::util::GetDownloadsFolderForProfile(profile);
 
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::BACKGROUND),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&base::ComputeDirectorySize, downloads_path),
       base::Bind(&StorageManagerHandler::OnGetDownloadsSize,
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
 void StorageManagerHandler::OnGetDownloadsSize(int64_t size) {
   updating_downloads_size_ = false;
   web_ui()->CallJavascriptFunctionUnsafe(
       "options.StorageManager.setDownloadsSize",
       base::Value(ui::FormatBytes(size)));
@@ skipping 178 matching lines @@
   web_ui()->CallJavascriptFunctionUnsafe("options.StorageManager.setArcSize",
                                          base::Value(size_string));
 }
 
 void StorageManagerHandler::OnClearDriveCacheDone(bool success) {
   UpdateDriveCacheSize();
 }
 
 }  // namespace options
 }  // namespace chromeos