Extension point for WorkManagerFactory(s).

pkg/analyzer/lib/plugin/task.dart

Index: pkg/analyzer/lib/plugin/task.dart
diff --git a/pkg/analyzer/lib/plugin/task.dart b/pkg/analyzer/lib/plugin/task.dart
index 8ea132fa16fd0d924bb8afe5ba5756b4849e263e..72c33fa78fc7f68334011a2b1764a0357ace0a7d 100644
--- a/pkg/analyzer/lib/plugin/task.dart
+++ b/pkg/analyzer/lib/plugin/task.dart
@@ -8,6 +8,7 @@
  */
 library analyzer.plugin.task;
 
+import 'package:analyzer/src/generated/engine.dart' hide WorkManager;
 import 'package:analyzer/src/plugin/engine_plugin.dart';
 import 'package:analyzer/task/model.dart';
 import 'package:plugin/plugin.dart';
@@ -19,3 +20,17 @@ import 'package:plugin/plugin.dart';
  */
 final String TASK_EXTENSION_POINT_ID = Plugin.join(
     EnginePlugin.UNIQUE_IDENTIFIER, EnginePlugin.TASK_EXTENSION_POINT);
+
+/**
+ * The identifier of the extension point that allows plugins to register new
+ * work managers with the analysis engine. The object used as an extension must
+ * be a [WorkManagerFactory].
+ */
+final String WORK_MANAGER_EXTENSION_POINT_ID = Plugin.join(
+    EnginePlugin.UNIQUE_IDENTIFIER,
+    EnginePlugin.WORK_MANAGER_FACTORY_EXTENSION_POINT);
+
+/**
+ * A function that will create a new [WorkManager] for the given [context].
+ */
+typedef WorkManager WorkManagerFactory(InternalAnalysisContext context);