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

third_party/pkg/di/lib/src/provider.dart

-library di.provider;
-
-import 'injector_delagate.dart';
-import 'base_injector.dart';
-import 'package:di/di.dart';
-
-abstract class ObjectFactory {
-  Object getInstanceByKey(Key key, BaseInjector requester, ResolutionContext resolving);
-}
-
-abstract class Provider {
-  final Visibility visibility;
-  final Type type;
-
-  Provider(this.type, this.visibility);
-
-  dynamic get(BaseInjector injector, BaseInjector requestor,
-      ObjectFactory objFactory, resolving);
-}
-
-class ValueProvider extends Provider {
-  dynamic value;
-
-  ValueProvider(type, this.value, [Visibility visibility])
-      : super(type, visibility);
-
-  dynamic get(BaseInjector injector, BaseInjector requestor,
-      ObjectFactory objFactory, resolving) => value;
-}
-
-class TypeProvider extends Provider {
-  TypeProvider(type, [Visibility visibility]) : super(type, visibility);
-
-  dynamic get(BaseInjector injector, BaseInjector requestor,
-      ObjectFactory objFactory, resolving) {
-    return injector.newInstanceOf(
-        type, objFactory, requestor, resolving);
-  }
-}
-
-class FactoryProvider extends Provider {
-  final Function factoryFn;
-
-  FactoryProvider(type, this.factoryFn, [Visibility visibility])
-      : super(type, visibility);
-
-  dynamic get(BaseInjector injector, BaseInjector requestor,
-       ObjectFactory objFactory, resolving) =>
-     factoryFn(new InjectorDelagate(injector, resolving));
-}