Adding Angular and dependent packages for testing

third_party/pkg/js/lib/src/wrapping/js/object_to_map_adapter.dart

Index: third_party/pkg/js/lib/src/wrapping/js/object_to_map_adapter.dart
diff --git a/third_party/pkg/js/lib/src/wrapping/js/object_to_map_adapter.dart b/third_party/pkg/js/lib/src/wrapping/js/object_to_map_adapter.dart
new file mode 100644
index 0000000000000000000000000000000000000000..c44ff65825797611050902189d94069cd63bd8e6
--- /dev/null
+++ b/third_party/pkg/js/lib/src/wrapping/js/object_to_map_adapter.dart
@@ -0,0 +1,55 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+part of js.wrapping;
+
+class JsObjectToMapAdapter<V> extends TypedProxy implements Map<String,V> {
+  static JsObjectToMapAdapter cast(Proxy proxy, [Translator translator]) =>
+      proxy == null ? null :
+          new JsObjectToMapAdapter.fromProxy(proxy, translator);
+  static JsObjectToMapAdapter castMapOfSerializables(Proxy proxy,
+      Mapper<dynamic, Serializable> fromJs, {mapOnlyNotNull: false}) =>
+          proxy == null ? null : new JsObjectToMapAdapter.fromProxy(proxy,
+              new TranslatorForSerializable(fromJs,
+                  mapOnlyNotNull: mapOnlyNotNull));
+
+  final Translator<V> _translator;
+
+  JsObjectToMapAdapter.fromProxy(Proxy proxy, [Translator<V> translator]) :
+      super.fromProxy(proxy), this._translator = translator;
+
+  @override V operator [](String key) => _fromJs($unsafe[key]);
+  @override void operator []=(String key, V value) {
+    $unsafe[key] = _toJs(value);
+  }
+  @override V remove(String key) {
+    final value = this[key];
+    deleteProperty($unsafe, key);
+    return value;
+  }
+  @override Iterable<String> get keys =>
+      JsArrayToListAdapter.cast(context['Object'].keys($unsafe));
+
+  // use Maps to implement functions
+  @override bool containsValue(V value) => Maps.containsValue(this, value);
+  @override bool containsKey(String key) =>
+      context['Object'].keys($unsafe).indexOf(key) != -1;
+  @override V putIfAbsent(String key, V ifAbsent()) =>
+      Maps.putIfAbsent(this, key, ifAbsent);
+  @override void addAll(Map<String, V> other) {
+    if (other != null) {
+      other.forEach((k,v) => this[k] = v);
+    }
+  }
+  @override void clear() => Maps.clear(this);
+  @override void forEach(void f(String key, V value)) => Maps.forEach(this, f);
+  @override Iterable<V> get values => Maps.getValues(this);
+  @override int get length => Maps.length(this);
+  @override bool get isEmpty => Maps.isEmpty(this);
+  @override bool get isNotEmpty => Maps.isNotEmpty(this);
+
+  dynamic _toJs(V e) => _translator == null ? e : _translator.toJs(e);
+  V _fromJs(dynamic value) => _translator == null ? value :
+      _translator.fromJs(value);
+}