Use constexpr TaskTraits constructor in chromecast.

chromecast/browser/url_request_context_factory.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 "chromecast/browser/url_request_context_factory.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 270 matching lines @@
   set_protocol = job_factory->SetProtocolHandler(
       url::kDataScheme, base::WrapUnique(new net::DataProtocolHandler));
   DCHECK(set_protocol);
 
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableLocalFileAccesses)) {
     set_protocol = job_factory->SetProtocolHandler(
         url::kFileScheme,
         base::MakeUnique<net::FileProtocolHandler>(
             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})));
     DCHECK(set_protocol);
   }
 
   // Set up interceptors in the reverse order.
   std::unique_ptr<net::URLRequestJobFactory> top_job_factory =
       std::move(job_factory);
   for (auto i = request_interceptors.rbegin(); i != request_interceptors.rend();
        ++i) {
     top_job_factory.reset(new net::URLRequestInterceptingJobFactory(
         std::move(top_job_factory), std::move(*i)));
@@ skipping 169 matching lines @@
   if (media_getter_) {
     media_getter_->GetURLRequestContext()
         ->http_transaction_factory()
         ->GetSession()
         ->DisableQuic();
   }
 }
 
 }  // namespace shell
 }  // namespace chromecast