Add a Mojo example apptest that runs in mojo_shell.

mojo/mojo_examples.gypi

Index: mojo/mojo_examples.gypi
diff --git a/mojo/mojo_examples.gypi b/mojo/mojo_examples.gypi
index 8e8cf0c750a51f75d07e0d76ed3c8378e6b0ca90..c88ea901f65dc535081429ea00db36fac179f9ab 100644
--- a/mojo/mojo_examples.gypi
+++ b/mojo/mojo_examples.gypi
@@ -37,6 +37,77 @@
       'includes': [ 'build/package_app.gypi' ],
     },
     {
+      'target_name': 'mojo_example_service_bindings',
+      'type': 'static_library',
+      'sources': [
+        # TODO(msw): Move to examples/services/public/interfaces/example ??? 
+        'examples/test/example_service.mojom',
+      ],
+      'includes': [ 'public/tools/bindings/mojom_bindings_generator.gypi' ],
+      'export_dependent_settings': [
+        'mojo_cpp_bindings',
+      ],
+      'dependencies': [
+        'mojo_cpp_bindings',
+      ],
+    },
+    { # TODO(msw): mojo/mojo_services.gypi or new mojo_unittest.gypi file ??? 
+      'target_name': 'mojo_example_service',
+      # TODO(msw): 'static_library', like mojo_profile_service ??? 
+      # TODO(msw): 'shared_library', like mojo_surfaces_service ??? 
+      # TODO(msw): 'executable',     like mojo_dbus_echo_service ??? 
+      # TODO(msw): '<(component)',   like mojo_native_viewport_service ??? 
+      'type': 'loadable_module',
+      'dependencies': [
+        '../base/base.gyp:base',
+        'mojo_application',                   # For ApplicationDelegate. 
+        'mojo_cpp_bindings',                  # For example_service.mojom.h 
+        'mojo_environment_standalone',        # For Environment. 
+        'mojo_example_service_bindings',
+        'mojo_utility',                       # For RunLoop. 
+        '<(mojo_system_for_loadable_module)',
+      ],
+      'sources': [
+        # TODO(msw): Include directly in mojo_example_unittests,
+        #            like services/test_service/test_service_impl.cc ??? 
+        # TODO(msw): Move to examples/services/example/ or elsewhere ??? 
+        'examples/test/example_service_application.cc',
+        'examples/test/example_service_application.h',
+        'examples/test/example_service_impl.cc',
+        'examples/test/example_service_impl.h',
+        'public/cpp/application/lib/mojo_main_standalone.cc',
+      ],
+    },
+    { # TODO(msw): New mojo_unittest.gypi file ??? 
+      'target_name': 'mojo_example_unittests',
+      'type': 'loadable_module',
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../base/base.gyp:test_support_base',
+        '../testing/gtest.gyp:gtest',
+        'mojo_application',                   # For ApplicationDelegate. 
+        'mojo_environment_standalone',        # For Environment. 
+        'mojo_example_service',
+        'mojo_example_service_bindings',      # TODO(msw): Needed explicitly? 
+        'mojo_shell_lib',                     # For shell::InitializeLogging. 
+        'mojo_shell_test_support',            # For shell::ShellTestHelper. 
+        'mojo_utility',                       # For RunLoop. 
+        '<(mojo_system_for_loadable_module)',
+      ],
+      'sources': [
+        # TODO(msw): Move to examples/services/example or elsewhere ??? 
+        'examples/test/example_unittest.cc',
+        'public/cpp/application/lib/mojo_main_standalone.cc',
+      ],
+    },
+    {
+      'target_name': 'package_mojo_example_unittests',
+      'variables': {
+        'app_name': 'mojo_example_unittests',
+      },
+      'includes': [ 'build/package_app.gypi' ],
+    },
+    {
       'target_name': 'mojo_compositor_app',
       'type': 'loadable_module',
       'dependencies': [