Use constexpr TaskTraits constructor in chrome.

chrome/browser/extensions/updater/extension_cache_impl.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/extensions/updater/extension_cache_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 14 matching lines @@
 
 namespace extensions {
 
 ExtensionCacheImpl::ExtensionCacheImpl(
     std::unique_ptr<ExtensionCacheDelegate> delegate)
     : cache_(new LocalExtensionCache(
           delegate->GetCacheDir(),
           delegate->GetMaximumCacheSize(),
           delegate->GetMaximumCacheAge(),
           base::CreateSequencedTaskRunnerWithTraits(
-              base::TaskTraits()
-                  .MayBlock()
-                  .WithPriority(base::TaskPriority::BACKGROUND)
-                  .WithShutdownBehavior(
-                      base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN)))),
+              {base::MayBlock(), base::TaskPriority::BACKGROUND,
+               base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN}))),
       weak_ptr_factory_(this) {
   notification_registrar_.Add(
       this, extensions::NOTIFICATION_EXTENSION_INSTALL_ERROR,
       content::NotificationService::AllBrowserContextsAndSources());
   cache_->Init(true, base::Bind(&ExtensionCacheImpl::OnCacheInitialized,
                                 weak_ptr_factory_.GetWeakPtr()));
 }
 
 ExtensionCacheImpl::~ExtensionCacheImpl() {
 }
@@ skipping 86 matching lines @@
       // We deliberately keep the file with incorrect hash sum, so that it
       // will not be re-downloaded each time.
       break;
     default:
       cache_->RemoveExtension(id, hash);
       break;
   }
 }
 
 }  // namespace extensions