fixes #27385, implement virtual fields in DDC

pkg/dev_compiler/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.
 
 define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       function(dart_sdk, async_helper, expect, unittest, is, require) {
   'use strict';
 
   async_helper = async_helper.async_helper;
   let minitest = expect.minitest;
@@ skipping 581 matching lines @@
       'generics_test_none_multi': fail,
       'globalized_closures2_test_00_multi': fail,
       'globalized_closures2_test_none_multi': fail,
       'globalized_closures_test_00_multi': fail,
       'globalized_closures_test_none_multi': fail,
       'hierarchy_invariants_test': fail,
       'hot_get_field_test': fail,
       'hot_set_field_test': fail,
       'inherited_metadata_test': fail,
       'instance_members_unimplemented_interface_test': fail,
+      'instance_members_with_override_test': fail, // JsClassMirror.instanceMembers unimplemented
       'instantiate_abstract_class_test': fail,
       'intercepted_superclass_test': fail,
       'invocation_fuzz_test_emptyarray_multi': fail,
       'invocation_fuzz_test_false_multi': fail,
       'invocation_fuzz_test_none_multi': fail,
       'invocation_fuzz_test_smi_multi': fail,
       'invocation_fuzz_test_string_multi': fail,
       'invoke_call_on_closure_test': fail,
       'invoke_closurization2_test': fail,
       'invoke_closurization_test': fail,
@@ skipping 232 matching lines @@
 
     for (let action of unittest_tests) {
       try {
         action();
       } catch (e) {
         console.error("Caught error tying to setup test:", e);
       }
     }
   });
 });