mus: Fix notifying clients about window reordering.

components/mus/ws/connection_manager.cc

Index: components/mus/ws/connection_manager.cc
diff --git a/components/mus/ws/connection_manager.cc b/components/mus/ws/connection_manager.cc
index 4eeecd6d9e300027136fa010b2f773e53eca73a1..49382540755558d9600064dc4344f02128d29f98 100644
--- a/components/mus/ws/connection_manager.cc
+++ b/components/mus/ws/connection_manager.cc
@@ -443,6 +443,7 @@ void ConnectionManager::OnWindowClientAreaChanged(
 void ConnectionManager::OnWindowReordered(ServerWindow* window,
                                           ServerWindow* relative,
                                           mojom::OrderDirection direction) {
+  ProcessWindowReorder(window, relative, direction);
   if (!in_destructor_)
     SchedulePaint(window, gfx::Rect(window->bounds().size()));
 }