Use constexpr TaskTraits constructor in net.

net/proxy/polling_proxy_config_service.cc

 // Copyright (c) 2012 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 "net/proxy/polling_proxy_config_service.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 73 matching lines @@
       // request while we are busy, we will defer it until the current poll
       // completes.
       poll_task_queued_ = true;
       return;
     }
 
     last_poll_time_ = base::TimeTicks::Now();
     poll_task_outstanding_ = true;
     poll_task_queued_ = false;
     base::PostTaskWithTraits(
-        FROM_HERE, base::TaskTraits().MayBlock().WithShutdownBehavior(
-                       base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN),
+        FROM_HERE,
+        {base::MayBlock(), base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
         base::Bind(&Core::PollAsync, this, get_config_func_));
   }
 
  private:
   friend class base::RefCountedThreadSafe<Core>;
   ~Core() {}
 
   void PollAsync(GetConfigFunction func) {
     ProxyConfig config;
     func(&config);
@@ skipping 78 matching lines @@
 
 PollingProxyConfigService::~PollingProxyConfigService() {
   core_->Orphan();
 }
 
 void PollingProxyConfigService::CheckForChangesNow() {
   core_->CheckForChangesNow();
 }
 
 }  // namespace net