Use constexpr TaskTraits constructor in chrome.

chrome/browser/ui/webui/settings/about_handler.cc

Index: chrome/browser/ui/webui/settings/about_handler.cc
diff --git a/chrome/browser/ui/webui/settings/about_handler.cc b/chrome/browser/ui/webui/settings/about_handler.cc
index e91c9225ce0022963a50aadf13ce06a9e7231345..660d07d2810ee9326643d8727a97b7397b0a0c6f 100644
--- a/chrome/browser/ui/webui/settings/about_handler.cc
+++ b/chrome/browser/ui/webui/settings/about_handler.cc
@@ -485,8 +485,7 @@ void AboutHandler::HandleGetVersionInfo(const base::ListValue* args) {
   CHECK(args->GetString(0, &callback_id));
 
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::USER_VISIBLE),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_VISIBLE},
       base::Bind(&GetVersionInfo),
       base::Bind(&AboutHandler::OnGetVersionInfoReady,
                  weak_factory_.GetWeakPtr(), callback_id));
@@ -504,8 +503,7 @@ void AboutHandler::HandleGetRegulatoryInfo(const base::ListValue* args) {
   CHECK(args->GetString(0, &callback_id));
 
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::USER_VISIBLE),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_VISIBLE},
       base::Bind(&FindRegulatoryLabelDir),
       base::Bind(&AboutHandler::OnRegulatoryLabelDirFound,
                  weak_factory_.GetWeakPtr(), callback_id));
@@ -625,8 +623,7 @@ void AboutHandler::OnRegulatoryLabelDirFound(
   }
 
   base::PostTaskWithTraitsAndReplyWithResult(
-      FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                     base::TaskPriority::USER_VISIBLE),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::USER_VISIBLE},
       base::Bind(&ReadRegulatoryLabelText, label_dir_path),
       base::Bind(&AboutHandler::OnRegulatoryLabelTextRead,
                  weak_factory_.GetWeakPtr(), callback_id, label_dir_path));