Add SourceFileEdit.time field.

pkg/analysis_server/lib/src/services/refactoring/rename_class_member.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_class_member;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart' hide Element, ElementKind;
 import 'package:analysis_server/src/services/correction/status.dart';
@@ skipping 102 matching lines @@
         // check the element being renamed is accessible
         {
           LibraryElement whereLibrary = reference.element.library;
           if (!element.isAccessibleIn(whereLibrary)) {
             continue;
           }
         }
         // add edit
         SourceEdit edit =
             createReferenceEdit(reference, newName, id: _newPotentialId());
-        change.addEdit(reference.file, edit);
+        addElementSourceChange(change, reference.element, edit);
       }
     }).then((_) => change);
   }
 
   String _newPotentialId() {
     String id = potentialEditIds.length.toString();
     potentialEditIds.add(id);
     return id;
   }
 }
@@ skipping 122 matching lines @@
     }
     return _prepareElements().then((_) {
       return Future.forEach(elements, (Element element) {
         return searchEngine.searchReferences(element).then((references) {
           this.references.addAll(references);
         });
       });
     });
   }
 }