Minor changes in analyzer to make it easier to extend

pkg/analyzer/lib/src/generated/engine.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine;
 
 import "dart:math" as math;
@@ skipping 1048 matching lines @@
    * not incrementally resolved.
    */
   Source incrementalResolutionValidation_lastLibrarySource;
 
   /**
    * The result of incremental resolution result of
    * [incrementalResolutionValidation_lastSource].
    */
   CompilationUnit incrementalResolutionValidation_lastUnit;
 
+  /** A factory to override how [ResolverVisitor] is created. */
+  ResolverVisitorFactory resolverVisitorFactory;
+
+  /** A factory to override how [TypeResolverVisitor] is created. */
+  TypeResolverVisitorFactory typeResolverVisitorFactory;
+
   /**
    * Initialize a newly created analysis context.
    */
   AnalysisContextImpl() {
     _resultRecorder = new AnalysisContextImpl_AnalysisTaskResultRecorder(this);
     _privatePartition = new UniversalCachePartition(
         this,
         AnalysisOptionsImpl.DEFAULT_CACHE_SIZE,
         new AnalysisContextImpl_ContextRetentionPolicy(this));
     _cache = createCacheFromSourceFactory(null);
@@ skipping 11338 matching lines @@
     if (element.id == _id) {
       result = element;
       throw new _ElementByIdFinderException();
     }
     super.visitElement(element);
   }
 }
 
 class _ElementByIdFinderException {
 }