Updating Angular version

third_party/pkg/angular/demo/todo/web/main.dart

 import 'package:di/di.dart';
 import 'package:angular/angular.dart';
 import 'package:angular/playback/playback_http.dart';
 import 'todo.dart';
 
 import 'dart:html';
 
+// Everything in the 'todo' library should be preserved by MirrorsUsed
+@MirrorsUsed(
+    targets: const['todo'],
+    override: '*')
+import 'dart:mirrors';
+
 main() {
 
   print(window.location.search);
   var module = new Module()
     ..type(TodoController)
     ..type(PlaybackHttpBackendConfig);
 
   // If these is a query in the URL, use the server-backed
   // TodoController.  Otherwise, use the stored-data controller.
   var query = window.location.search;
@@ skipping 10 matching lines @@
     module.type(HttpBackend, implementedBy: RecordingHttpBackend);
   }
 
   if (query == '?playback') {
     print('Using playback HttpBackend');
     module.type(HttpBackend, implementedBy: PlaybackHttpBackend);
   }
 
   ngBootstrap(module:module);
 }