Fill the new index in Analysis Server.

pkg/analysis_server/lib/src/operation/operation_analysis.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 operation.analysis;
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computer/computer_highlights.dart';
 import 'package:analysis_server/src/computer/computer_highlights2.dart';
 import 'package:analysis_server/src/computer/computer_outline.dart';
@@ skipping 441 matching lines @@
     return ServerOperationPriority.ANALYSIS_INDEX;
   }
 
   @override
   void perform(AnalysisServer server) {
     ServerPerformanceStatistics.indexOperation.makeCurrentWhile(() {
       try {
         Index index = server.index;
         AnalysisContext context = unit.element.context;
         index.index(context, unit);
+        server.index2?.indexUnit(unit);
       } catch (exception, stackTrace) {
         server.sendServerErrorNotification(
             'Failed to index: $file', exception, stackTrace);
       }
     });
   }
 }
 
 abstract class _DartNotificationOperation extends _SingleFileOperation {
   final CompilationUnit unit;
@@ skipping 70 matching lines @@
 abstract class _SingleFileOperation extends SourceSensitiveOperation {
   final String file;
 
   _SingleFileOperation(AnalysisContext context, this.file) : super(context);
 
   @override
   bool shouldBeDiscardedOnSourceChange(Source source) {
     return source.fullName == file;
   }
 }