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

pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/classes.dart

 // 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.
 
 /// This library defines the operations that define and manipulate Dart
 /// classes.  Included in this are:
 ///   - Generics
 ///   - Class metadata
 ///   - Extension methods
 ///
@@ skipping 522 matching lines @@
 ///
 /// The constructor
 defineNamedConstructorCallable(clazz, name, ctor) => JS(
     '',
     '''(() => {
   ctor.prototype = $clazz.prototype;
   // Use defineProperty so we don't hit a property defined on Function,
   // like `caller` and `arguments`.
   $defineProperty($clazz, $name, { value: ctor, configurable: true });
 })()''');
+
+defineEnumValues(enumClass, names) => JS(
+    '',
+    '''(() => {
+  let values = [];
+  for (var i = 0; i < $names.length; i++) {
+    let value = $const_(new $enumClass(i));
+    values.push(value);
+    Object.defineProperty($enumClass, $names[i],
+        { value: value, configurable: true });
+  }
+  $enumClass.values = $constList(values, $enumClass);
+})()''');