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

pkg/analyzer/test/generated/resolver_test.dart

 // Copyright (c) 2014, 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 engine.resolver_test;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/context/context.dart' as newContext;
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 25 matching lines @@
 main() {
   groupSep = ' | ';
   runReflectiveTests(AnalysisDeltaTest);
   runReflectiveTests(ChangeSetTest);
   runReflectiveTests(EnclosedScopeTest);
   runReflectiveTests(LibraryImportScopeTest);
   runReflectiveTests(LibraryScopeTest);
   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);
   runReflectiveTests(SubtypeManagerTest);
   runReflectiveTests(TypeOverrideManagerTest);
   runReflectiveTests(TypeProviderImplTest);
   runReflectiveTests(TypeResolverVisitorTest);
   runReflectiveTests(CheckedModeCompileTimeErrorCodeTest);
   runReflectiveTests(ErrorResolverTest);
   runReflectiveTests(HintCodeTest);
@@ skipping 13810 matching lines @@
         // check propagated type
         FunctionType propagatedType = node.propagatedType as FunctionType;
         expect(propagatedType.returnType, test.typeProvider.stringType);
       } on AnalysisException catch (e, stackTrace) {
         thrownException[0] = new CaughtException(e, stackTrace);
       }
     }
     return null;
   }
 }