mus: Disregard windows that explicitly set can_accept_events to be false when sending events.

services/ui/ws/test_utils.h

Index: services/ui/ws/test_utils.h
diff --git a/services/ui/ws/test_utils.h b/services/ui/ws/test_utils.h
index e701b55deb5e7b23b12ab959538856cece40ee27..6641a0366fbd1777e71f70fa5980d21054111caa 100644
--- a/services/ui/ws/test_utils.h
+++ b/services/ui/ws/test_utils.h
@@ -94,6 +94,9 @@ class WindowTreeTestApi {
   void set_window_manager_internal(mojom::WindowManager* wm_internal) {
     tree_->window_manager_internal_ = wm_internal;
   }
+  void SetCanAcceptEvents(Id transport_window_id, bool can_accept_events) {
+    tree_->SetCanAcceptEvents(transport_window_id, can_accept_events);
+  }
   void AckOldestEvent() {
     tree_->OnWindowInputEventAck(tree_->event_ack_id_,
                                  mojom::EventResult::UNHANDLED);