Issue 24538. Route SDK results into SDK context DartWorkManager.

pkg/analyzer/lib/src/task/dart_work_manager.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.
 
 library analyzer.src.task.dart_work_manager;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/generated/engine.dart'
@@ skipping 247 matching lines @@
    * Notifies the manager about [SourceFactory] changes.
    */
   void onSourceFactoryChanged() {
     _invalidateAllLocalResolutionInformation(true);
   }
 
   @override
   void resultsComputed(
       AnalysisTarget target, Map<ResultDescriptor, dynamic> outputs) {
     bool isDartSource = _isDartSource(target);
+    // Route SDK outputs to the SDK WorkManager.
+    if (isDartSource && target.source.isInSystemLibrary) {
+      SourceFactory sourceFactory = context.sourceFactory;
+      InternalAnalysisContext sdkContext = sourceFactory.dartSdk.context;
+      if (sdkContext != context) {
+        for (WorkManager sdkWorkManager in sdkContext.workManagers) {
+          if (sdkWorkManager is DartWorkManager) {
+            sdkWorkManager.resultsComputed(target, outputs);
+            return;
+          }
+        }
+      }
+    }
     // Organize sources.
     bool isDartLibrarySource = false;
     if (isDartSource) {
       Source source = target;
       SourceKind kind = outputs[SOURCE_KIND];
       if (kind != null) {
         unknownSourceQueue.remove(source);
         if (kind == SourceKind.LIBRARY) {
           isDartLibrarySource = true;
           if (context.prioritySources.contains(source)) {
@@ skipping 158 matching lines @@
     }
   }
 
   bool _shouldErrorsBeComputed(Source source) =>
       context.shouldErrorsBeAnalyzed(source, null);
 
   static bool _isDartSource(AnalysisTarget target) {
     return target is Source && AnalysisEngine.isDartFileName(target.fullName);
   }
 }