Record IS_ANCESTOR_OF relations.

pkg/analyzer/lib/src/summary/format.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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script "pkg/analyzer/tool/generate_files".
 
 library analyzer.src.summary.format;
 
 import 'flat_buffers.dart' as fb;
@@ skipping 15 matching lines @@
 
 class _IndexRelationKindReader extends fb.Reader<idl.IndexRelationKind> {
   const _IndexRelationKindReader() : super();
 
   @override
   int get size => 1;
 
   @override
   idl.IndexRelationKind read(fb.BufferPointer bp) {
     int index = const fb.Uint8Reader().read(bp);
-    return index < idl.IndexRelationKind.values.length ? idl.IndexRelationKind.values[index] : idl.IndexRelationKind.IS_EXTENDED_BY;
+    return index < idl.IndexRelationKind.values.length ? idl.IndexRelationKind.values[index] : idl.IndexRelationKind.IS_ANCESTOR_OF;
   }
 }
 
 class _IndexSyntheticElementKindReader extends fb.Reader<idl.IndexSyntheticElementKind> {
   const _IndexSyntheticElementKindReader() : super();
 
   @override
   int get size => 1;
 
   @override
@@ skipping 7666 matching lines @@
     "propagatedTypeSlot": propagatedTypeSlot,
     "type": type,
     "visibleLength": visibleLength,
     "visibleOffset": visibleOffset,
   };
 
   @override
   String toString() => convert.JSON.encode(toJson());
 }