When in-body incremantal resolution is performed, it should update REFERENCED_NAMES.

pkg/analyzer/lib/src/generated/incremental_resolver.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 analyzer.src.generated.incremental_resolver;
 
 import 'dart:collection';
 import 'dart:math' as math;
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 852 matching lines @@
     }
   }
 
   void _updateEntry() {
     // scan results
     _sourceEntry.setValueIncremental(SCAN_ERRORS, _newScanErrors, true);
     _sourceEntry.setValueIncremental(LINE_INFO, _newLineInfo, false);
     // parse results
     _sourceEntry.setValueIncremental(PARSE_ERRORS, _newParseErrors, true);
     _sourceEntry.setValueIncremental(PARSED_UNIT, _oldUnit, false);
+    // referenced names
+    ReferencedNames referencedNames = new ReferencedNames(_unitSource);
+    new ReferencedNamesBuilder(referencedNames).build(_oldUnit);
+    _sourceEntry.setValueIncremental(REFERENCED_NAMES, referencedNames, false);
   }
 
   /**
    * Checks if [token] has a balanced number of open and closed curly brackets.
    */
   static bool _areCurlyBracketsBalanced(Token token) {
     int numOpen = _getTokenCount(token, TokenType.OPEN_CURLY_BRACKET);
     int numOpen2 =
         _getTokenCount(token, TokenType.STRING_INTERPOLATION_EXPRESSION);
     int numClosed = _getTokenCount(token, TokenType.CLOSE_CURLY_BRACKET);
@@ skipping 405 matching lines @@
   @override
   String toString() => name;
 }
 
 class _TokenPair {
   final _TokenDifferenceKind kind;
   final Token oldToken;
   final Token newToken;
   _TokenPair(this.kind, this.oldToken, this.newToken);
 }