mojo: terminate apps if the shell goes away

mojo/mojo_public.gypi

Index: mojo/mojo_public.gypi
diff --git a/mojo/mojo_public.gypi b/mojo/mojo_public.gypi
index 42cc9f504f49a106e43e62dca7923b403a9efcde..e00d7dc82730cfd617a8063135c62f83dcdcd09a 100644
--- a/mojo/mojo_public.gypi
+++ b/mojo/mojo_public.gypi
@@ -180,7 +180,7 @@
     },
     {
       # GN version: //mojo/public/cpp/application
-      'target_name': 'mojo_application',
+      'target_name': 'mojo_application_base',
       'type': 'static_library',
       'sources': [
         'public/cpp/application/application_impl.h',
@@ -200,6 +200,19 @@
         'mojo_service_provider_bindings',
       ],
     },
+    {
+      'target_name': 'mojo_application_standalone',
+      'type': 'static_library',
+      'sources': [
+        'public/cpp/application/lib/application_impl_standalone.cc',
+      ],
+      'dependencies': [
+        'mojo_application_base',
+      ],
+      'export_dependent_settings': [
+        'mojo_application_base',
+      ],
+    },
   ],
   'conditions': [
     ['OS == "android"', {