Use constexpr TaskTraits constructor in chrome.

chrome/browser/favicon/large_icon_service_factory.cc

 // Copyright 2015 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/favicon/large_icon_service_factory.h"
 
 #include "base/memory/singleton.h"
 #include "base/task_scheduler/post_task.h"
 #include "chrome/browser/favicon/favicon_service_factory.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
@@ skipping 34 matching lines @@
 
 KeyedService* LargeIconServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   Profile* profile = Profile::FromBrowserContext(context);
   favicon::FaviconService* favicon_service =
       FaviconServiceFactory::GetForProfile(profile,
                                            ServiceAccessType::EXPLICIT_ACCESS);
   return new favicon::LargeIconService(
       favicon_service,
       base::CreateTaskRunnerWithTraits(
-          base::TaskTraits()
-              .MayBlock()
-              .WithPriority(base::TaskPriority::BACKGROUND)
-              .WithShutdownBehavior(
-                  base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN)),
+          {base::MayBlock(), base::TaskPriority::BACKGROUND,
+           base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN}),
       base::MakeUnique<image_fetcher::ImageFetcherImpl>(
           base::MakeUnique<suggestions::ImageDecoderImpl>(),
           profile->GetRequestContext()));
 }
 
 bool LargeIconServiceFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }