Use constexpr TaskTraits constructor in chrome.

chrome/browser/chromeos/first_run/goodies_displayer.cc

Index: chrome/browser/chromeos/first_run/goodies_displayer.cc
diff --git a/chrome/browser/chromeos/first_run/goodies_displayer.cc b/chrome/browser/chromeos/first_run/goodies_displayer.cc
index de762cf39eee52ea302bbbe83e171dd2d0be3ead..de474ea205991136d8f88b07d1a28c324504132f 100644
--- a/chrome/browser/chromeos/first_run/goodies_displayer.cc
+++ b/chrome/browser/chromeos/first_run/goodies_displayer.cc
@@ -84,8 +84,7 @@ bool GoodiesDisplayer::Init() {
       prefs::kCanShowOobeGoodiesPage);
   if (can_show) {
     base::PostTaskWithTraitsAndReplyWithResult(
-        FROM_HERE, base::TaskTraits().MayBlock().WithPriority(
-                       base::TaskPriority::BACKGROUND),
+        FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
         base::Bind(&CheckGoodiesPrefAgainstOobeTimestamp),
         base::Bind(&UpdateGoodiesPrefCantShow));
   }