Make RefactoringStatus a collection of generated RefactoringProblems.

pkg/analysis_server/lib/src/services/refactoring/rename_constructor.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 services.src.refactoring.rename_constructor;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol2.dart' show SourceEdit;
 import 'package:analysis_server/src/services/correction/change.dart';
@@ skipping 60 matching lines @@
     ClassElement parentClass = element.enclosingElement;
     for (Element newNameMember in getChildren(parentClass, newName)) {
       String message =
           format(
               "Class '{0}' already declares {1} with name '{2}'.",
               parentClass.displayName,
               getElementKindName(newNameMember),
               newName);
       result.addError(
           message,
-          new RefactoringStatusContext.forElement(newNameMember));
+          createLocation_forElement(newNameMember));
     }
   }
 }