Use constexpr TaskTraits constructor in ui.

ui/ozone/platform/drm/host/drm_display_host_manager.cc

Index: ui/ozone/platform/drm/host/drm_display_host_manager.cc
diff --git a/ui/ozone/platform/drm/host/drm_display_host_manager.cc b/ui/ozone/platform/drm/host/drm_display_host_manager.cc
index f99ac41e516742d510cd9e83fad8cbca16293aaa..eefd7e983989451abfec1b5d2e7b32dfcd256788 100644
--- a/ui/ozone/platform/drm/host/drm_display_host_manager.cc
+++ b/ui/ozone/platform/drm/host/drm_display_host_manager.cc
@@ -248,10 +248,8 @@ void DrmDisplayHostManager::ProcessEvent() {
         if (drm_devices_.find(event.path) == drm_devices_.end()) {
           base::PostTaskWithTraits(
               FROM_HERE,
-              base::TaskTraits()
-                  .WithShutdownBehavior(
-                      base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN)
-                  .MayBlock(),
+              {base::MayBlock(),
+               base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
               base::Bind(&OpenDeviceAsync, event.path,
                          base::ThreadTaskRunnerHandle::Get(),
                          base::Bind(&DrmDisplayHostManager::OnAddGraphicsDevice,