Revert "Remove unnecessary hide clauses"

pkg/analysis_server/lib/src/services/refactoring/move_file.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.move_file;
 
 import 'dart:async';
-import 'dart:core';
+import 'dart:core' hide Resource;
 
 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/refactoring/refactoring.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring_internal.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
@@ skipping 155 matching lines @@
             if (uri.startsWith(oldPrefix)) {
               doSourceChange_addElementEdit(
                   change,
                   library,
                   new SourceEdit(element.uriOffset + 1, oldPrefix.length,
                       'package:$newPackageName/'));
             }
           }
         }
       }
-
       updateUriElements(library.imports);
       updateUriElements(library.exports);
     }
     // done
     return change;
   }
 
   String _getRelativeUri(String path, String from) {
     String uri = pathContext.relative(path, from: from);
     List<String> parts = pathContext.split(uri);
@@ skipping 40 matching lines @@
       }
     }
   }
 
   void _updateUriReferences(List<UriReferencedElement> elements) {
     for (UriReferencedElement element in elements) {
       _updateUriReference(element);
     }
   }
 }