Add @jsify annotation. Support automatically proxying Lists and Maps to Dart in Proxies. Support co…

test_sources/non_transformed/lib/library2.dart

Index: test_sources/non_transformed/lib/library2.dart
diff --git a/test_sources/non_transformed/lib/library2.dart b/test_sources/non_transformed/lib/library2.dart
index cfca92f92277694f050a6250a95c99cba0cf61ce..4b22b59755d23b8afeda0a82b09bfce0b35c9c28 100644
--- a/test_sources/non_transformed/lib/library2.dart
+++ b/test_sources/non_transformed/lib/library2.dart
@@ -13,6 +13,18 @@ abstract class Library2 extends JsInterface {
   Gizmo createGizmo(String x);
 
   JsAndDart createJsAndDart(int i);
+
+  List createList(a, b, c);
+
+  String joinList(@jsify List list);
+
+  // The returned object is only a transient wrapper on the underlying JS
+  // object. We might want to make this clear by requiring metadata like
+  // @JsMap. We also might want to support @dartify which would do a deep
+  // copy+convert from JS to Dart
+  Map<String, int> createMap(k1, v1, k2, v2);
+
+  String joinMap(@jsify Map<String, int> map);
 }
 
 @JsProxy(global: true)