Issue 26096. Explicitly compute the result that ensures that directives are resolved in units.

pkg/analysis_server/lib/src/analysis_server.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 analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:core' hide Resource;
 import 'dart:math' show max;
@@ skipping 1453 matching lines @@
    * for summary information and linking pre-indexed packages into the index,
    * but for now we only invalidate project specific index information.
    */
   void _setupIndexInvalidation() {
     if (index == null) {
       return;
     }
     onContextsChanged.listen((ContextsChangedEvent event) {
       for (AnalysisContext context in event.added) {
         context
-            .onResultChanged(RESOLVED_UNIT2)
+            .onResultChanged(RESOLVED_UNIT3)
             .listen((ResultChangedEvent event) {
           if (event.wasComputed) {
             Object value = event.value;
             if (value is CompilationUnit) {
               index.indexDeclarations(value);
             }
           }
         });
         context
             .onResultChanged(RESOLVED_UNIT)
@@ skipping 266 matching lines @@
   /**
    * The [PerformanceTag] for time spent in server request handlers.
    */
   static PerformanceTag serverRequests = new PerformanceTag('serverRequests');
 
   /**
    * The [PerformanceTag] for time spent in split store microtasks.
    */
   static PerformanceTag splitStore = new PerformanceTag('splitStore');
 }