Support constructor invocation in analyzer2dart.

tests/compiler/dart2js/mock_libraries.dart

Index: tests/compiler/dart2js/mock_libraries.dart
diff --git a/tests/compiler/dart2js/mock_libraries.dart b/tests/compiler/dart2js/mock_libraries.dart
index 62f6d988ecd9e3494bdc534e55a4e0d2f7e792a1..d1d9ae2fb53bfa4a6002acaa8614e1e93ba4e98e 100644
--- a/tests/compiler/dart2js/mock_libraries.dart
+++ b/tests/compiler/dart2js/mock_libraries.dart
@@ -28,7 +28,12 @@ const Map<String, String> DEFAULT_CORE_LIBRARY = const <String, String>{
         DateTime(year);
         DateTime.utc(year);
       }''',
-  'deprecated': 'const deprecated = 0;',
+      'Deprecated': r'''
+      class Deprecated extends Object {
+        final String expires;
+        const Deprecated(this.expires);
+      }''',
+  'deprecated': 'const Object deprecated = const Deprecated("next release");',
   'double': r'''
       abstract class double extends num {
         static var NAN = 0;