Use constexpr TaskTraits constructor in chrome.

chrome/browser/ui/webui/help/help_handler.cc

 // Copyright (c) 2012 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/webui/help/help_handler.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 442 matching lines @@
   static_cast<VersionUpdaterCros*>(version_updater_.get())->GetUpdateStatus(
       base::Bind(&HelpHandler::SetUpdateStatus, base::Unretained(this)));
 #else
   RequestUpdate(NULL);
 #endif
 }
 
 void HelpHandler::OnPageLoaded(const base::ListValue* args) {
 #if defined(OS_CHROMEOS)
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::BACKGROUND),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&chromeos::version_loader::GetVersion,
                  chromeos::version_loader::VERSION_FULL),
       base::Bind(&HelpHandler::OnOSVersion, weak_factory_.GetWeakPtr()));
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::BACKGROUND),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&chromeos::version_loader::GetARCVersion),
       base::Bind(&HelpHandler::OnARCVersion, weak_factory_.GetWeakPtr()));
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::BACKGROUND),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&chromeos::version_loader::GetFirmware),
       base::Bind(&HelpHandler::OnOSFirmware, weak_factory_.GetWeakPtr()));
 
   web_ui()->CallJavascriptFunctionUnsafe(
       "help.HelpPage.updateEnableReleaseChannel",
       base::Value(CanChangeChannel(Profile::FromWebUI(web_ui()))));
 
   base::Time build_time = base::SysInfo::GetLsbReleaseTime();
   base::string16 build_date = base::TimeFormatFriendlyDate(build_time);
   web_ui()->CallJavascriptFunctionUnsafe("help.HelpPage.setBuildDate",
@@ skipping 22 matching lines @@
   version_updater_->GetChannel(false,
       base::Bind(&HelpHandler::OnTargetChannel, weak_factory_.GetWeakPtr()));
 
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           chromeos::switches::kDisableEolNotification)) {
     version_updater_->GetEolStatus(
         base::Bind(&HelpHandler::OnEolStatus, weak_factory_.GetWeakPtr()));
   }
 
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::BACKGROUND),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&FindRegulatoryLabelDir),
       base::Bind(&HelpHandler::OnRegulatoryLabelDirFound,
                  weak_factory_.GetWeakPtr()));
 #endif
 }
 
 #if defined(OS_MACOSX)
 void HelpHandler::PromoteUpdater(const base::ListValue* args) {
   version_updater_->PromoteUpdater();
 }
@@ skipping 180 matching lines @@
 void HelpHandler::OnTargetChannel(const std::string& channel) {
   web_ui()->CallJavascriptFunctionUnsafe("help.HelpPage.updateTargetChannel",
                                          base::Value(channel));
 }
 
 void HelpHandler::OnRegulatoryLabelDirFound(const base::FilePath& path) {
   if (path.empty())
     return;
 
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::BACKGROUND),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&ReadRegulatoryLabelText, path),
       base::Bind(&HelpHandler::OnRegulatoryLabelTextRead,
                  weak_factory_.GetWeakPtr()));
 
   // Send the image path to the WebUI.
   OnRegulatoryLabelImageFound(path.AppendASCII(kRegulatoryLabelImageFilename));
 }
 
 void HelpHandler::OnRegulatoryLabelImageFound(const base::FilePath& path) {
   std::string url = std::string("chrome://") + chrome::kChromeOSAssetHost +
@@ skipping 21 matching lines @@
                                            base::Value("device_supported"),
                                            base::Value(""));
   } else {
     web_ui()->CallJavascriptFunctionUnsafe(
         "help.HelpPage.updateEolMessage", base::Value("device_endoflife"),
         base::Value(l10n_util::GetStringUTF16(IDS_ABOUT_PAGE_EOL_EOL)));
   }
 }
 
 #endif  // defined(OS_CHROMEOS)