Use constexpr TaskTraits constructor in net.

net/ssl/channel_id_service.cc

Index: net/ssl/channel_id_service.cc
diff --git a/net/ssl/channel_id_service.cc b/net/ssl/channel_id_service.cc
index 0c1b71f8cdc277ca6a36f202a36121efefa55d38..2be6a6bd776b799cd57f1cbec3ca8bcc6f58e37a 100644
--- a/net/ssl/channel_id_service.cc
+++ b/net/ssl/channel_id_service.cc
@@ -120,10 +120,8 @@ class ChannelIDServiceWorker {
       task_runner->PostTask(FROM_HERE, callback);
     } else {
       base::PostTaskWithTraits(
-          FROM_HERE, base::TaskTraits()
-                         .WithShutdownBehavior(
-                             base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN)
-                         .MayBlock(),
+          FROM_HERE,
+          {base::MayBlock(), base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
           callback);
     }
   }