Remove AnalysisContext.refactoringUnsafeSources.

pkg/analyzer/test/src/task/driver_test.dart

 // Copyright (c) 2015, 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 test.src.task.driver_test;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/src/cancelable_future.dart';
@@ skipping 556 matching lines @@
   List<Source> get librarySources => baseContext.librarySources;
 
   @override
   Stream<SourcesChangedEvent> get onSourcesChanged =>
       baseContext.onSourcesChanged;
 
   @override
   List<Source> get prioritySources => baseContext.prioritySources;
 
   @override
-  List<Source> get refactoringUnsafeSources =>
-      baseContext.refactoringUnsafeSources;
-
-  @override
   ResolverVisitorFactory get resolverVisitorFactory =>
       baseContext.resolverVisitorFactory;
 
   SourceFactory get sourceFactory => baseContext.sourceFactory;
 
   void set sourceFactory(SourceFactory factory) {
     baseContext.sourceFactory = factory;
   }
 
   @override
@@ skipping 274 matching lines @@
   void setContents(Source source, String contents) {
     baseContext.setContents(source, contents);
   }
 
   @override
   void visitCacheItems(void callback(Source source, SourceEntry dartEntry,
       DataDescriptor rowDesc, CacheState state)) {
     baseContext.visitCacheItems(callback);
   }
 }