Use constexpr TaskTraits constructor in base.

base/trace_event/trace_log.cc

 // Copyright 2015 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 "base/trace_event/trace_log.h"
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 #include <utility>
@@ skipping 953 matching lines @@
     if (!flush_output_callback.is_null()) {
       scoped_refptr<RefCountedString> empty_result = new RefCountedString;
       flush_output_callback.Run(empty_result, false);
     }
     return;
   }
 
   if (use_worker_thread_) {
     base::PostTaskWithTraits(
         FROM_HERE,
-        base::TaskTraits()
-            .MayBlock()
-            .WithPriority(base::TaskPriority::BACKGROUND)
-            .WithShutdownBehavior(
-                base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN),
+        {MayBlock(), TaskPriority::BACKGROUND,
+         TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
         BindOnce(&TraceLog::ConvertTraceEventsToTraceFormat,
                  Passed(&previous_logged_events), flush_output_callback,
                  argument_filter_predicate));
     return;
   }
 
   ConvertTraceEventsToTraceFormat(std::move(previous_logged_events),
                                   flush_output_callback,
                                   argument_filter_predicate);
 }
@@ skipping 746 matching lines @@
 }
 
 ScopedTraceBinaryEfficient::~ScopedTraceBinaryEfficient() {
   if (*category_group_enabled_) {
     TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(category_group_enabled_, name_,
                                                 event_handle_);
   }
 }
 
 }  // namespace trace_event_internal