Use constexpr TaskTraits constructor in chrome.

chrome/browser/password_manager/password_manager_util_win.cc

Index: chrome/browser/password_manager/password_manager_util_win.cc
diff --git a/chrome/browser/password_manager/password_manager_util_win.cc b/chrome/browser/password_manager/password_manager_util_win.cc
index 9a114fafbc08a625a71385154c2e14b4a85d1ba8..01dd5c2821f1ed2eb44a2f58d0efe2d5ef172637 100644
--- a/chrome/browser/password_manager/password_manager_util_win.cc
+++ b/chrome/browser/password_manager/password_manager_util_win.cc
@@ -209,9 +209,7 @@ void GetOsPasswordStatus() {
   OsPasswordStatus* status_weak = status.get();
   // This task calls ::LogonUser(), hence MayBlock().
   base::PostTaskWithTraitsAndReply(
-      FROM_HERE, base::TaskTraits()
-                     .WithPriority(base::TaskPriority::BACKGROUND)
-                     .MayBlock(),
+      FROM_HERE, {base::MayBlock(), base::TaskPriority::BACKGROUND},
       base::Bind(&GetOsPasswordStatusInternal, prefs_weak, status_weak),
       base::Bind(&ReplyOsPasswordStatus, base::Passed(&prefs),
                  base::Passed(&status)));