Use constexpr TaskTraits constructor in content.

content/browser/renderer_host/pepper/pepper_network_monitor_host.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 "content/browser/renderer_host/pepper/pepper_network_monitor_host.h"
 
 #include <stddef.h>
 
 #include "base/task_runner_util.h"
 #include "base/task_scheduler/post_task.h"
@@ skipping 69 matching lines @@
 
   net::NetworkChangeNotifier::AddIPAddressObserver(this);
   GetAndSendNetworkList();
 }
 
 void PepperNetworkMonitorHost::GetAndSendNetworkList() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   // Call GetNetworkList() on a thread that allows blocking IO.
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::BACKGROUND),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&GetNetworkList),
       base::Bind(&PepperNetworkMonitorHost::SendNetworkList,
                  weak_factory_.GetWeakPtr()));
 }
 
 void PepperNetworkMonitorHost::SendNetworkList(
     std::unique_ptr<net::NetworkInterfaceList> list) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   std::unique_ptr<ppapi::proxy::SerializedNetworkList> list_copy(
@@ skipping 15 matching lines @@
     network_copy.type = PP_NETWORKLIST_TYPE_UNKNOWN;
     network_copy.state = PP_NETWORKLIST_STATE_UP;
     network_copy.display_name = network.name;
     network_copy.mtu = 0;
   }
   host()->SendUnsolicitedReply(
       pp_resource(), PpapiPluginMsg_NetworkMonitor_NetworkList(*list_copy));
 }
 
 }  // namespace content