Use constexpr TaskTraits constructor in chrome.

chrome/browser/ui/ash/chrome_screenshot_grabber.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 "chrome/browser/ui/ash/chrome_screenshot_grabber.h"
 
 #include <stddef.h>
 
 #include "ash/shell.h"
 #include "ash/strings/grit/ash_strings.h"
@@ skipping 263 matching lines @@
 
   return file_name;
 }
 
 }  // namespace
 
 ChromeScreenshotGrabber::ChromeScreenshotGrabber()
     : screenshot_grabber_(new ui::ScreenshotGrabber(
           this,
           base::CreateTaskRunnerWithTraits(
-              base::TaskTraits()
-                  .MayBlock()
-                  .WithPriority(base::TaskPriority::USER_VISIBLE)
-                  .WithShutdownBehavior(
-                      base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN)))),
+              {base::MayBlock(), base::TaskPriority::USER_VISIBLE,
+               base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN}))),
       profile_for_test_(NULL) {
   screenshot_grabber_->AddObserver(this);
 }
 
 ChromeScreenshotGrabber::~ChromeScreenshotGrabber() {
   screenshot_grabber_->RemoveObserver(this);
 }
 
 void ChromeScreenshotGrabber::HandleTakeScreenshotForAllRootWindows() {
   if (ScreenshotsDisabled()) {
@@ skipping 169 matching lines @@
 }
 
 void ChromeScreenshotGrabber::SetProfileForTest(Profile* profile) {
   profile_for_test_ = profile;
 }
 
 Profile* ChromeScreenshotGrabber::GetProfile() {
   return profile_for_test_ ? profile_for_test_
                            : ProfileManager::GetActiveUserProfile();
 }