Use WorkManager(s) in AnalysisDriver.

pkg/analyzer/test/src/task/dart_work_manager_test.dart

Index: pkg/analyzer/test/src/task/dart_work_manager_test.dart
diff --git a/pkg/analyzer/test/src/task/dart_work_manager_test.dart b/pkg/analyzer/test/src/task/dart_work_manager_test.dart
index 16cbe4431d1b2253a13336581719208f61e28dd8..072ecb5cdb48b51a541fa1c8b34d8db6b94b047b 100644
--- a/pkg/analyzer/test/src/task/dart_work_manager_test.dart
+++ b/pkg/analyzer/test/src/task/dart_work_manager_test.dart
@@ -11,6 +11,7 @@ import 'package:analyzer/src/generated/java_engine.dart' show CaughtException;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/task/dart.dart';
 import 'package:analyzer/src/task/dart_work_manager.dart';
+import 'package:analyzer/src/task/driver.dart';
 import 'package:analyzer/task/dart.dart';
 import 'package:typed_mock/typed_mock.dart';
 import 'package:unittest/unittest.dart';
@@ -218,6 +219,20 @@ class DartWorkManagerTest {
     expect_unknownSourceQueue([source2]);
   }
 
+  void test_getNextResultPriority_hasLibrary() {
+    manager.librarySourceQueue.addAll([source1]);
+    expect(manager.getNextResultPriority(), WorkOrderPriority.NORMAL);
+  }
+
+  void test_getNextResultPriority_hasUnknown() {
+    manager.unknownSourceQueue.addAll([source1]);
+    expect(manager.getNextResultPriority(), WorkOrderPriority.NORMAL);
+  }
+
+  void test_getNextResultPriority_nothingToDo() {
+    expect(manager.getNextResultPriority(), WorkOrderPriority.NONE);
+  }
+
   void test_resultsComputed_isLibrary() {
     manager.unknownSourceQueue.addAll([source1, source2, source3]);
     manager.resultsComputed(source2, {SOURCE_KIND: SourceKind.LIBRARY});