Cascade shutdown of instances

mojo/shell/tests/lifecycle/BUILD.gn

Index: mojo/shell/tests/lifecycle/BUILD.gn
diff --git a/mojo/shell/tests/lifecycle/BUILD.gn b/mojo/shell/tests/lifecycle/BUILD.gn
index 34b0a648d5452e2c8be66c35c7fa97720174c55e..fbc2ac72fb340243e8c7734b0fb47dd9b0e9a419 100644
--- a/mojo/shell/tests/lifecycle/BUILD.gn
+++ b/mojo/shell/tests/lifecycle/BUILD.gn
@@ -25,6 +25,7 @@ source_set("lifecycle") {
 
   data_deps = [
     ":lifecycle_unittest_app",
+    ":lifecycle_unittest_parent",
     ":lifecycle_unittest_exe",
     ":lifecycle_unittest_package",
     ":manifest",
@@ -115,6 +116,27 @@ mojo_application_manifest("lifecycle_unittest_app_manifest") {
   source = "app_manifest.json"
 }
 
+mojo_native_application("lifecycle_unittest_parent") {
+  testonly = true
+  sources = [
+    "parent.cc",
+  ]
+  deps = [
+    ":interfaces",
+    "//base",
+    "//mojo/shell/public/cpp:sources",
+  ]
+
+  data_deps = [
+    ":lifecycle_unittest_parent_manifest",
+  ]
+}
+
+mojo_application_manifest("lifecycle_unittest_parent_manifest") {
+  application_name = "lifecycle_unittest_parent"
+  source = "parent_manifest.json"
+}
+
 executable("lifecycle_unittest_exe") {
   testonly = true
   sources = [