Move SourceReference, extract duplicate code.

pkg/analysis_server/lib/src/services/refactoring/rename_unit_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_unit_member;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart' show Location, SourceChange;
 import 'package:analysis_server/src/services/correction/status.dart';
@@ skipping 77 matching lines @@
     if (element is FunctionTypeAliasElement) {
       result.addStatus(validateFunctionTypeAliasName(newName));
     }
     if (element is ClassElement) {
       result.addStatus(validateClassName(newName));
     }
     return result;
   }
 
   @override
-  Future<SourceChange> createChange() {
-    SourceChange change = new SourceChange(refactoringName);
+  Future fillChange() {
     // prepare elements
     List<Element> elements = [];
     if (element is PropertyInducingElement && element.isSynthetic) {
       PropertyInducingElement property = element as PropertyInducingElement;
       PropertyAccessorElement getter = property.getter;
       PropertyAccessorElement setter = property.setter;
       if (getter != null) {
         elements.add(getter);
       }
       if (setter != null) {
         elements.add(setter);
       }
     } else {
       elements.add(element);
     }
     // update each element
     return Future.forEach(elements, (Element element) {
-      // update declaration
-      addDeclarationEdit(change, element);
-      // schedule updating references
-      return searchEngine.searchReferences(element).then((refMatches) {
-        List<SourceReference> references = getSourceReferences(refMatches);
-        for (SourceReference reference in references) {
-          addReferenceEdit(change, reference);
-        }
-      });
-    }).then((_) {
-      return change;
+      addDeclarationEdit(element);
+      return searchEngine.searchReferences(element).then(addReferenceEdits);
     });
   }
 }
 
 
 /**
  * Helper to check if the created or renamed [Element] will cause any conflicts.
  */
 class _RenameUnitMemberValidator {
   final SearchEngine searchEngine;
@@ skipping 129 matching lines @@
                 elementKind.displayName,
                 getElementKindName(member),
                 getElementQualifiedName(member));
             result.addError(message, new Location.fromMatch(memberReference));
           }
         });
       });
     });
   }
 }