Index: ui/aura/window.h |
diff --git a/ui/aura/window.h b/ui/aura/window.h |
index c036dbe915f226f3099fcc0f5292393c5ee1a4fe..89b24bbf02ac9df8768b67404175cc2578338ff9 100644 |
--- a/ui/aura/window.h |
+++ b/ui/aura/window.h |
@@ -73,6 +73,9 @@ class AURA_EXPORT Window : public ui::LayerDelegate, |
public ui::EventTarget, |
public ui::GestureConsumer { |
public: |
+ // Initial value of id() for newly created windows. |
+ static constexpr int kInitialId = -1; |
+ |
// Used when stacking windows. |
enum StackDirection { |
STACK_ABOVE, |