fix #27775, enum declaration where "name" is a property

pkg/dev_compiler/test/codegen/language/enum_value_name_test.dart

 // Copyright (c) 2016, 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.
 
+// SharedOptions=--enable-enum
+
 import 'package:expect/expect.dart';
 
-class Foo {
-  static int get x => 42;
-}
-
-class Bar extends Foo {
-  static int x = 12;
-}
+enum ErrorContext { general, name, description, targets }
 
 void main() {
-  Expect.equals(12, Bar.x);
-}
+  Expect.equals(ErrorContext.name, ErrorContext.name);
+}