Use constexpr TaskTraits constructor in chrome.

chrome/browser/ui/views/elevation_icon_setter.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/views/elevation_icon_setter.h"
 
 #include "base/callback.h"
 #include "base/task_scheduler/post_task.h"
 #include "build/build_config.h"
 #include "ui/views/controls/button/label_button.h"
@@ skipping 44 matching lines @@
 }  // namespace
 
 
 // ElevationIconSetter --------------------------------------------------------
 
 ElevationIconSetter::ElevationIconSetter(views::LabelButton* button,
                                          const base::Closure& callback)
     : button_(button),
       weak_factory_(this) {
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::USER_BLOCKING),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_BLOCKING},
       base::Bind(&GetElevationIcon),
       base::Bind(&ElevationIconSetter::SetButtonIcon,
                  weak_factory_.GetWeakPtr(), callback));
 }
 
 ElevationIconSetter::~ElevationIconSetter() {
 }
 
 void ElevationIconSetter::SetButtonIcon(const base::Closure& callback,
                                         std::unique_ptr<SkBitmap> icon) {
   if (icon) {
     float device_scale_factor = 1.0f;
 #if defined(OS_WIN)
     // Windows gives us back a correctly-scaled image for the current DPI, so
     // mark this image as having been scaled for the current DPI already.
     device_scale_factor = display::win::GetDPIScale();
 #endif
     button_->SetImage(
         views::Button::STATE_NORMAL,
         gfx::ImageSkia(gfx::ImageSkiaRep(*icon, device_scale_factor)));
     button_->SizeToPreferredSize();
     if (button_->parent())
       button_->parent()->Layout();
     if (!callback.is_null())
       callback.Run();
   }
 }