Use constexpr TaskTraits constructor in chrome.

chrome/browser/ui/webui/settings/chromeos/device_storage_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/chromeos/device_storage_handler.h"
 
 #include <algorithm>
 #include <numeric>
 #include <string>
 
@@ skipping 125 matching lines @@
 }
 
 void StorageHandler::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()
-          .WithPriority(base::TaskPriority::USER_VISIBLE)
-          .MayBlock(),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_VISIBLE},
       base::Bind(&GetSizeStatBlocking, downloads_path, total_size,
                  available_size),
       base::Bind(&StorageHandler::OnGetSizeStat, base::Unretained(this),
                  base::Owned(total_size), base::Owned(available_size)));
 }
 
 void StorageHandler::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 StorageHandler::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(&StorageHandler::OnGetDownloadsSize, base::Unretained(this)));
 }
 
 void StorageHandler::OnGetDownloadsSize(int64_t size) {
   updating_downloads_size_ = false;
   CallJavascriptFunction("cr.webUIListenerCallback",
                          base::Value("storage-downloads-size-changed"),
                          base::Value(ui::FormatBytes(size)));
 }
@@ skipping 180 matching lines @@
                          base::Value("storage-android-size-changed"),
                          base::Value(size_string));
 }
 
 void StorageHandler::OnClearDriveCacheDone(bool success) {
   UpdateDriveCacheSize();
 }
 
 }  // namespace settings
 }  // namespace chromeos