Index: services/ui/ws/window_tree.h |
diff --git a/services/ui/ws/window_tree.h b/services/ui/ws/window_tree.h |
index ff71bda9353ed8db5d10e749f9c1e815f6484f06..fd404f0e1ae4a8581a088ea4930cff92059adf7f 100644 |
--- a/services/ui/ws/window_tree.h |
+++ b/services/ui/ws/window_tree.h |
@@ -410,7 +410,8 @@ class WindowTree : public mojom::WindowTree, |
Id transport_window_id, |
const gfx::Insets& insets, |
mojo::Array<gfx::Rect> transport_additional_client_areas) override; |
- void SetHitTestMask(Id transport_window_id, const gfx::Rect& mask) override; |
+ void SetHitTestMask(Id transport_window_id, |
+ const base::Optional<gfx::Rect>& mask) override; |
void GetWindowManagerClient( |
mojo::AssociatedInterfaceRequest<mojom::WindowManagerClient> internal) |
override; |