mojo: terminate apps if the shell goes away

mojo/mojo.gyp

Index: mojo/mojo.gyp
diff --git a/mojo/mojo.gyp b/mojo/mojo.gyp
index 0cec9137058d641d830bf2c03934f4757a3fbd53..0b3f8b29ada57a4cbb5fde8b5cb807b22ff70a7d 100644
--- a/mojo/mojo.gyp
+++ b/mojo/mojo.gyp
@@ -457,6 +457,19 @@
       ],
     },
     {
+      'target_name': 'mojo_application_chromium',
+      'type': 'static_library',
+      'sources': [
+        'public/cpp/application/lib/application_impl_chromium.cc',
+      ],
+      'dependencies': [
+        'mojo_application_base',
+      ],
+      'export_dependent_settings': [
+        'mojo_application_base',
+      ],
+    },
+    {
       # GN version: //mojo/environment:chromium_impl
       'target_name': 'mojo_environment_chromium_impl',
       'type': '<(component)',
@@ -543,7 +556,7 @@
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../net/net.gyp:net',
         '../url/url.gyp:url_lib',
-        'mojo_application',
+        'mojo_application_chromium',
         'mojo_common_lib',
         'mojo_external_service_bindings',
         'mojo_gles2_impl',
@@ -717,7 +730,7 @@
         'mojo_environment_chromium',
         'mojo_run_all_unittests',
         'mojo_service_manager',
-        'mojo_application',
+        'mojo_application_chromium',
       ],
       'includes': [ 'public/tools/bindings/mojom_bindings_generator.gypi' ],
       'sources': [
@@ -946,7 +959,7 @@
             '../dbus/dbus.gyp:dbus',
             'mojo_common_lib',
             'mojo_external_service_bindings',
-            'mojo_application',
+            'mojo_application_chromium',
             'mojo_system_impl',
           ],
           'sources': [