Use constexpr TaskTraits constructor in chromeos.

chromeos/network/client_cert_resolver.cc

 // Copyright 2013 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 "chromeos/network/client_cert_resolver.h"
 
 #include <cert.h>
 #include <certt.h>  // for (SECCertUsageEnum) certUsageAnyCA
 #include <pk11pub.h>
 
@@ skipping 498 matching lines @@
          *networks_to_resolve) {
       queued_networks_to_resolve_.insert(network_and_pattern.service_path);
     }
     return;
   }
 
   VLOG(2) << "Start task for resolving client cert patterns.";
   resolve_task_running_ = true;
   base::PostTaskWithTraitsAndReplyWithResult(
       FROM_HERE,
-      base::TaskTraits()
-          .WithShutdownBehavior(
-              base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN)
-          .MayBlock(),
+      {base::MayBlock(), base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
       base::Bind(&FindCertificateMatches, CertLoader::Get()->all_certs(),
                  CertLoader::Get()->system_certs(),
                  base::Owned(networks_to_resolve.release()), Now()),
       base::Bind(&ClientCertResolver::ConfigureCertificates,
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
 void ClientCertResolver::ResolvePendingNetworks() {
   NetworkStateHandler::NetworkStateList networks;
   network_state_handler_->GetNetworkListByType(NetworkTypePattern::Default(),
@@ skipping 55 matching lines @@
     observer.ResolveRequestCompleted(changed);
 }
 
 base::Time ClientCertResolver::Now() const {
   if (testing_clock_)
     return testing_clock_->Now();
   return base::Time::Now();
 }
 
 }  // namespace chromeos