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

services/ui/ws/window_tree_unittest.cc

Index: services/ui/ws/window_tree_unittest.cc
diff --git a/services/ui/ws/window_tree_unittest.cc b/services/ui/ws/window_tree_unittest.cc
index 028ba9be9d9eb4bfe3d177b3e41b994031771546..dc230f892cc3ad29d0b38c5a5e165f04c55ca7a7 100644
--- a/services/ui/ws/window_tree_unittest.cc
+++ b/services/ui/ws/window_tree_unittest.cc
@@ -1245,6 +1245,18 @@ TEST_F(WindowTreeTest, InvalidMoveLoopStillAcksAttempt) {
             SingleChangeToDescription(*embed_client->tracker()->changes()));
 }
 
+TEST_F(WindowTreeTest, SetCanAcceptEvents) {
+  TestWindowTreeClient* embed_client = nullptr;
+  WindowTree* tree = nullptr;
+  ServerWindow* window = nullptr;
+  EXPECT_NO_FATAL_FAILURE(SetupEventTargeting(&embed_client, &tree, &window));
+
+  EXPECT_TRUE(window->can_accept_events());
+  WindowTreeTestApi(tree).SetCanAcceptEvents(
+      ClientWindowIdForWindow(tree, window).id, false);
+  EXPECT_FALSE(window->can_accept_events());
+}
+
 }  // namespace test
 }  // namespace ws
 }  // namespace ui