Don't run old implementation tests with 'useTaskModel == true'.

pkg/analyzer/test/generated/resolver_test.dart

Index: pkg/analyzer/test/generated/resolver_test.dart
diff --git a/pkg/analyzer/test/generated/resolver_test.dart b/pkg/analyzer/test/generated/resolver_test.dart
index 5929e066c4da39e6b09412101805d0bf30a2d4a9..72bfa95ccb7dbb4698cd8bbfc7eddb51555788d2 100644
--- a/pkg/analyzer/test/generated/resolver_test.dart
+++ b/pkg/analyzer/test/generated/resolver_test.dart
@@ -43,9 +43,15 @@ main() {
   runReflectiveTests(ScopeTest);
   runReflectiveTests(ElementResolverTest);
   runReflectiveTests(InheritanceManagerTest);
-  runReflectiveTests(LibraryElementBuilderTest);
-  runReflectiveTests(LibraryResolver2Test);
-  runReflectiveTests(LibraryResolverTest);
+  if (!AnalysisEngine.instance.useTaskModel) {
+    runReflectiveTests(LibraryElementBuilderTest);
+  }
+  if (!AnalysisEngine.instance.useTaskModel) {
+    runReflectiveTests(LibraryResolver2Test);
+  }
+  if (!AnalysisEngine.instance.useTaskModel) {
+    runReflectiveTests(LibraryResolverTest);
+  }
   runReflectiveTests(LibraryTest);
   runReflectiveTests(StaticTypeAnalyzerTest);
   runReflectiveTests(StaticTypeAnalyzer2Test);