Use constexpr TaskTraits constructor in chromeos.

chromeos/dbus/lorgnette_manager_client.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 "chromeos/dbus/lorgnette_manager_client.h"
 
 #include <memory>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 88 matching lines @@
     virtual ~ScanToStringCompletion() {}
 
     // Creates a file stream in |file| that will stream image data to
     // a string that will be supplied to |callback|.  Passes ownership
     // of |this| to a returned callback.
     CompletionCallback Start(const ScanImageToStringCallback& callback,
                              base::ScopedFD* fd) {
       CHECK(!pipe_reader_.get());
       pipe_reader_.reset(new chromeos::PipeReaderForString(
           base::CreateTaskRunnerWithTraits(
-              base::TaskTraits().MayBlock().WithShutdownBehavior(
-                  base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN)),
+              {base::MayBlock(),
+               base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN}),
           base::Bind(&ScanToStringCompletion::OnScanToStringDataCompleted,
                      base::Unretained(this))));
       *fd = pipe_reader_->StartIO();
 
       return base::Bind(&ScanToStringCompletion::OnScanToStringCompleted,
                         base::Owned(this), callback);
     }
 
    private:
     // Called when a |pipe_reader_| completes reading scan data to a string.
@@ skipping 91 matching lines @@
 
 LorgnetteManagerClient::~LorgnetteManagerClient() {
 }
 
 // static
 LorgnetteManagerClient* LorgnetteManagerClient::Create() {
   return new LorgnetteManagerClientImpl();
 }
 
 }  // namespace chromeos