Workaround for ConstantVisitor dependency issues.

pkg/analysis_server/test/services/refactoring/extract_local_test.dart

 // Copyright (c) 2014, 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.
 
 library test.services.refactoring.extract_local;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/refactoring/extract_local.dart';
@@ skipping 270 matching lines @@
     return _assertSuccessfulRefactoring('''
 main() {
   const res = 1;
   const [res + 2, 3];
 }
 ''');
   }
 
   test_const_inList_inConditionalExpression() {
     indexTestUnit('''
-main(bool b) {
-  const [b ? 1 : 2, 3];
+main() {
+  const [true ? 1 : 2, 3];
 }
 ''');
     _createRefactoringForString('1');
     // apply refactoring
     return _assertSuccessfulRefactoring('''
-main(bool b) {
+main() {
   const res = 1;
-  const [b ? res : 2, 3];
+  const [true ? res : 2, 3];
 }
 ''');
   }
 
   test_const_inList_inParenthesis() {
     indexTestUnit('''
 main() {
   const [(1), 2];
 }
 ''');
@@ skipping 636 matching lines @@
     int length = search.length;
     _createRefactoring(offset, length);
   }
 
   void _createRefactoringWithSuffix(String selectionSearch, String suffix) {
     int offset = findOffset(selectionSearch + suffix);
     int length = selectionSearch.length;
     _createRefactoring(offset, length);
   }
 }