Adding Angular and dependent packages for testing

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

Index: third_party/pkg/angular/demo/todo/main.dart
diff --git a/samples/third_party/angular_todo/main.dart b/third_party/pkg/angular/demo/todo/main.dart
similarity index 76%
copy from samples/third_party/angular_todo/main.dart
copy to third_party/pkg/angular/demo/todo/main.dart
index 4e968b4cc4ebef1e25971eccecb90980d6f300f7..69c654d17ae3b3d8a57f3ac7181f1a2475a954b9 100644
--- a/samples/third_party/angular_todo/main.dart
+++ b/third_party/pkg/angular/demo/todo/main.dart
@@ -3,24 +3,6 @@ import 'package:angular/angular.dart';
 import 'package:angular/playback/playback_http.dart';
 import 'todo.dart';
 
-@MirrorsUsed(targets: const[
-  'angular',
-  'angular.core',
-  'angular.core.dom',
-  'angular.filter',
-  'angular.perf',
-  'angular.directive',
-  'angular.routing',
-  'angular.core.parser',
-  'todo',
-  'perf_api',
-  'List',
-  'NodeTreeSanitizer',
-  'PlaybackHttpBackendConfig'
-  ],
-  override: '*')
-import 'dart:mirrors';
-
 import 'dart:html';
 
 main() {