Use constexpr TaskTraits constructor in chrome.

chrome/browser/chromeos/hats/hats_dialog.cc

 // Copyright (c) 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/chromeos/hats/hats_dialog.h"
 
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/task_scheduler/post_task.h"
 #include "chrome/browser/profiles/profile_manager.h"
@@ skipping 107 matching lines @@
 void HatsDialog::CreateAndShow(bool is_google_account) {
   Profile* profile = ProfileManager::GetActiveUserProfile();
   std::string user_locale =
       profile->GetPrefs()->GetString(prefs::kApplicationLocale);
   if (!user_locale.length())
     user_locale = kDefaultProfileLocale;
 
   std::unique_ptr<HatsDialog> hats_dialog(new HatsDialog);
 
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::BACKGROUND),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&GetFormattedSiteContext, user_locale, kDeviceInfoStopKeyword),
       base::Bind(&HatsDialog::Show, base::Passed(&hats_dialog),
                  is_google_account ? kGooglerSiteID : kSiteID));
 }
 
 // static
 void HatsDialog::Show(std::unique_ptr<HatsDialog> hats_dialog,
                       std::string site_id,
                       std::string site_context) {
   // Load and set the html data that needs to be displayed in the dialog.
@@ skipping 46 matching lines @@
 bool HatsDialog::ShouldShowDialogTitle() const {
   return false;
 }
 
 bool HatsDialog::HandleContextMenu(const content::ContextMenuParams& params) {
   // Disable context menu.
   return true;
 }
 
 }  // namespace chromeos