implement exports, fixes #141

test/browser/language_tests.js

 // Copyright (c) 2015, 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.
 
 (function() {
   'use strict';
 
   let _isolate_helper = dart_library.import('dart/_isolate_helper');
   _isolate_helper.startRootIsolate(function() {}, []);
 
@@ skipping 50 matching lines @@
     dartLanguageTests([
       // TODO(jmesserly): figure out why this test is hanging.
       //'async_star_cancel_and_throw_in_finally_test',
       'async_star_regression_23116_test',
       'asyncstar_concat_test',
       'asyncstar_throw_in_catch_test',
       'asyncstar_yield_test',
       'asyncstar_yieldstar_test'
     ]);
   });
+
+  suite('export', () => {
+    dartLanguageTests([
+      'duplicate_export_test',
+      'export_cyclic_test',
+      'export_double_same_main_test',
+      'export_main_override_test',
+      'export_main_test',
+      'export_test',
+      'local_export_test',
+      'reexport_core_test',
+      'top_level_entry_test'
+    ]);
+  });
+
 })();