Use constexpr TaskTraits constructor in chrome.

chrome/browser/ui/views/apps/app_info_dialog/app_info_summary_panel.cc

 // Copyright 2014 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/views/apps/app_info_dialog/app_info_summary_panel.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 263 matching lines @@
     ShowAppHomePage();
   } else if (source == licenses_link_) {
     DisplayLicenses();
   } else {
     NOTREACHED();
   }
 }
 
 void AppInfoSummaryPanel::StartCalculatingAppSize() {
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::USER_VISIBLE),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_VISIBLE},
       base::Bind(&base::ComputeDirectorySize, app_->path()),
       base::Bind(&AppInfoSummaryPanel::OnAppSizeCalculated, AsWeakPtr()));
 }
 
 void AppInfoSummaryPanel::OnAppSizeCalculated(int64_t app_size_in_bytes) {
   const int one_mebibyte_in_bytes = 1024 * 1024;
   if (app_size_in_bytes < one_mebibyte_in_bytes) {
     size_value_->SetText(
         l10n_util::GetStringUTF16(IDS_APPLICATION_INFO_SIZE_SMALL_LABEL));
   } else {
@@ skipping 55 matching lines @@
     const extensions::Extension* imported_module =
         service->GetExtensionById(shared_module.extension_id, true);
     DCHECK(imported_module);
 
     GURL about_page = extensions::ManifestURL::GetAboutPage(imported_module);
     if (about_page != GURL::EmptyGURL())
       license_urls.push_back(about_page);
   }
   return license_urls;
 }