Use constexpr TaskTraits constructor in chrome.

chrome/browser/policy/cloud/test_request_interceptor.cc

 // Copyright (c) 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 "chrome/browser/policy/cloud/test_request_interceptor.h"
 
 #include <limits>
 #include <memory>
 #include <queue>
 #include <utility>
@@ skipping 47 matching lines @@
     net::NetworkDelegate* network_delegate) {
   return HttpErrorJobCallback("400 Bad request", request, network_delegate);
 }
 
 net::URLRequestJob* FileJobCallback(const base::FilePath& file_path,
                                     net::URLRequest* request,
                                     net::NetworkDelegate* network_delegate) {
   return new net::URLRequestMockHTTPJob(
       request, network_delegate, file_path,
       base::CreateTaskRunnerWithTraits(
-          base::TaskTraits()
-              .MayBlock()
-              .WithPriority(base::TaskPriority::BACKGROUND)
-              .WithShutdownBehavior(
-                  base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN)));
+          {base::MayBlock(), base::TaskPriority::BACKGROUND,
+           base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN}));
 }
 
 // Parses the upload data in |request| into |request_msg|, and validates the
 // request. The query string in the URL must contain the |expected_type| for
 // the "request" parameter. Returns true if all checks succeeded, and the
 // request data has been parsed into |request_msg|.
 bool ValidRequest(net::URLRequest* request,
                   const std::string& expected_type,
                   em::DeviceManagementRequest* request_msg) {
   if (request->method() != "POST")
@@ skipping 261 matching lines @@
   io_task_runner_->PostTask(FROM_HERE, task);
   base::RunLoop run_loop;
   io_task_runner_->PostTask(
       FROM_HERE, base::BindOnce(base::IgnoreResult(&base::TaskRunner::PostTask),
                                 base::ThreadTaskRunnerHandle::Get(), FROM_HERE,
                                 run_loop.QuitClosure()));
   run_loop.Run();
 }
 
 }  // namespace policy