Set layer name when dcheck is on

Bug: None
Change-Id: I9e90e23f01d3d67aa479fe79864d47cd067aa62a
Reviewed-on: https://chromium-review.googlesource.com/c/1351150
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611142}

ui/aura/window.cc

@@ -1335,7 +1335,7 @@ std::unique_ptr<ui::Layer> Window::RecreateLayer() {
 }
 
 void Window::UpdateLayerName() {
-#if !defined(NDEBUG)
+#if DCHECK_IS_ON()
   DCHECK(layer());
 
   std::string layer_name(GetName());