Revert "Update all Angular libs (run update_all.sh)."

third_party/pkg/angular/lib/core/service.dart

Index: third_party/pkg/angular/lib/core/service.dart
diff --git a/third_party/pkg/angular/lib/core/service.dart b/third_party/pkg/angular/lib/core/service.dart
new file mode 100644
index 0000000000000000000000000000000000000000..c934e3a3ae73bd49e4380cc96e7c7a0a45cc95e9
--- /dev/null
+++ b/third_party/pkg/angular/lib/core/service.dart
@@ -0,0 +1,9 @@
+library angular.core.service;
+
+/**
+ * An annotation when applied to a class indicates that the class (service) will
+ * be instantiated by di injector.
+ */
+class NgInjectableService {
+  const NgInjectableService();
+}