Remove references to Engine classes from protocol.dart

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/protocol.dart' hide Element;
+import 'package:analysis_server/src/protocol_server.dart' hide Element;
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/correction/util.dart';
 import 'package:analysis_server/src/services/refactoring/naming_conventions.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring_internal.dart';
 import 'package:analysis_server/src/services/refactoring/rename.dart';
 import 'package:analysis_server/src/services/search/hierarchy.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/java_core.dart';
@@ skipping 40 matching lines @@
           reference.addEdit(change, replacement);
         }
       }
     });
   }
 
   void _analyzePossibleConflicts(RefactoringStatus result) {
     // check if there are members with "newName" in the same ClassElement
     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 Location.fromElement(newNameMember));
+      String message = format(
+          "Class '{0}' already declares {1} with name '{2}'.",
+          parentClass.displayName,
+          getElementKindName(newNameMember),
+          newName);
+      result.addError(message, newLocation_fromElement(newNameMember));
     }
   }
 }