Use constexpr TaskTraits constructor in chrome.

chrome/browser/chromeos/system_logs/debug_daemon_log_source.cc

Index: chrome/browser/chromeos/system_logs/debug_daemon_log_source.cc
diff --git a/chrome/browser/chromeos/system_logs/debug_daemon_log_source.cc b/chrome/browser/chromeos/system_logs/debug_daemon_log_source.cc
index fc6049a584a005a4b899940b8b8c4a81cb707e8f..27615fbcc308a86a0f5d1e0220a71b387f6dd845 100644
--- a/chrome/browser/chromeos/system_logs/debug_daemon_log_source.cc
+++ b/chrome/browser/chromeos/system_logs/debug_daemon_log_source.cc
@@ -152,8 +152,7 @@ void DebugDaemonLogSource::OnGetUserLogFiles(
     }
 
     base::PostTaskWithTraitsAndReply(
-        FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                       base::TaskPriority::BACKGROUND),
+        FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
         base::Bind(&DebugDaemonLogSource::ReadUserLogFiles, user_log_files,
                    profile_dirs, response),
         base::Bind(&DebugDaemonLogSource::MergeResponse,