Use constexpr TaskTraits constructor in extensions.

extensions/browser/content_verify_job.cc

 // Copyright 2014 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 "extensions/browser/content_verify_job.h"
 
 #include <algorithm>
 
 #include "base/metrics/histogram_macros.h"
 #include "base/stl_util.h"
@@ skipping 48 matching lines @@
   UMA_HISTOGRAM_COUNTS("ExtensionContentVerifyJob.TimeSpentUS",
                        time_spent_.InMicroseconds());
 }
 
 void ContentVerifyJob::Start() {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (g_test_observer)
     g_test_observer->JobStarted(hash_reader_->extension_id(),
                                 hash_reader_->relative_path());
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE,
-      base::TaskTraits().MayBlock().WithPriority(
-          base::TaskPriority::USER_VISIBLE),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_VISIBLE},
       base::Bind(&ContentHashReader::Init, hash_reader_),
       base::Bind(&ContentVerifyJob::OnHashesReady, this));
 }
 
 void ContentVerifyJob::BytesRead(int count, const char* data) {
   ScopedElapsedTimer timer(&time_spent_);
   DCHECK(thread_checker_.CalledOnValidThread());
   if (failed_)
     return;
   if (g_test_delegate) {
@@ skipping 147 matching lines @@
             << " reason:" << reason;
     std::move(failure_callback_).Run(reason);
   }
   if (g_test_observer) {
     g_test_observer->JobFinished(hash_reader_->extension_id(),
                                  hash_reader_->relative_path(), reason);
   }
 }
 
 }  // namespace extensions