Handle resolvedAst for forwarding constructors and callType on unnamed mixin applications.

tests/compiler/dart2js/serialization/test_data.dart

Index: tests/compiler/dart2js/serialization/test_data.dart
diff --git a/tests/compiler/dart2js/serialization/test_data.dart b/tests/compiler/dart2js/serialization/test_data.dart
index 652e3c5ea7ccff43cd5db3825bef56f1c0b24256..1da062016064c6edc38cbb6d541a4fa147a640d8 100644
--- a/tests/compiler/dart2js/serialization/test_data.dart
+++ b/tests/compiler/dart2js/serialization/test_data.dart
@@ -238,7 +238,14 @@ main() => new C();'''
     'main.dart': '''
 main() => const Duration();
 ''',
-  })
+  }),
+
+  const Test(const {
+    'main.dart': '''
+import 'dart:collection';
+main() => new UnmodifiableListView(null);
+''',
+  }),
 ];
 
 class Test {