Cascade shutdown of instances

mojo/shell/tests/connect/BUILD.gn

Index: mojo/shell/tests/connect/BUILD.gn
diff --git a/mojo/shell/tests/connect/BUILD.gn b/mojo/shell/tests/connect/BUILD.gn
index 48c19a15b5719e30911d795e76340342a2eac535..fc70dd049fc42f2ce117c99e39a2401de58c79c1 100644
--- a/mojo/shell/tests/connect/BUILD.gn
+++ b/mojo/shell/tests/connect/BUILD.gn
@@ -24,6 +24,7 @@ source_set("connect") {
   data_deps = [
     ":connect_test_app",
     ":connect_test_class_app",
+    ":connect_test_singleton_app",
     ":connect_test_driver",
     ":connect_test_exe",
     ":connect_test_package",
@@ -123,6 +124,24 @@ mojo_application_manifest("connect_test_class_app_manifest") {
   source = "connect_test_class_app_manifest.json"
 }
 
+mojo_native_application("connect_test_singleton_app") {
+  testonly = true
+  sources = [
+    "connect_test_singleton_app.cc",
+  ]
+  deps = [
+    ":connect_test_singleton_app_manifest",
+    "//base",
+    "//mojo/common:common_base",
+    "//mojo/shell/public/cpp:sources",
+  ]
+}
+
+mojo_application_manifest("connect_test_singleton_app_manifest") {
+  application_name = "connect_test_singleton_app"
+  source = "connect_test_singleton_app_manifest.json"
+}
+
 executable("connect_test_driver") {
   testonly = true