Fix cross-partition dependency handling (issue 26466)

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 64 matching lines @@
   /**
    * A table mapping part sources to the library sources that include them.
    */
   final HashMap<Source, List<Source>> partLibrariesMap =
       new HashMap<Source, List<Source>>();
 
   /**
    * Initialize a newly created manager.
    */
   DartWorkManager(this.context) {
-    analysisCache.onResultInvalidated.listen((InvalidatedResult event) {
+    context.onResultInvalidated.listen((InvalidatedResult event) {
       if (event.descriptor == LIBRARY_ERRORS_READY) {
         CacheEntry entry = event.entry;
         if (entry.explicitlyAdded &&
             entry.getValue(SOURCE_KIND) == SourceKind.LIBRARY) {
           librarySourceQueue.add(entry.target);
         }
       }
     });
   }
 
@@ skipping 374 matching lines @@
     }
   }
 
   bool _shouldErrorsBeComputed(Source source) =>
       context.shouldErrorsBeAnalyzed(source);
 
   static bool _isDartSource(AnalysisTarget target) {
     return target is Source && AnalysisEngine.isDartFileName(target.fullName);
   }
 }