Use constexpr TaskTraits constructor in ui.

ui/ozone/platform/drm/gpu/gbm_surfaceless.cc

Index: ui/ozone/platform/drm/gpu/gbm_surfaceless.cc
diff --git a/ui/ozone/platform/drm/gpu/gbm_surfaceless.cc b/ui/ozone/platform/drm/gpu/gbm_surfaceless.cc
index 722de976b72684a39248b0e149258c3f0d5b33b2..4b4913b78f7cf8d7b718e263c47cb9ca62a820b2 100644
--- a/ui/ozone/platform/drm/gpu/gbm_surfaceless.cc
+++ b/ui/ozone/platform/drm/gpu/gbm_surfaceless.cc
@@ -128,10 +128,7 @@ void GbmSurfaceless::SwapBuffersAsync(const SwapCompletionCallback& callback) {
 
   base::PostTaskWithTraitsAndReply(
       FROM_HERE,
-      base::TaskTraits()
-          .WithShutdownBehavior(
-              base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN)
-          .MayBlock(),
+      {base::MayBlock(), base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
       fence_wait_task, fence_retired_callback);
 }