Make possible to don't track cache dependencies.

pkg/analyzer/test/src/task/driver_test.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.test.src.task.driver_test;
 
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/task/driver.dart';
@@ skipping 801 matching lines @@
 
 /**
  * A dummy [InternalAnalysisContext] that does not use [AnalysisDriver] itself,
  * but provides enough implementation for it to function.
  */
 class _InternalAnalysisContextMock extends TypedMock
     implements InternalAnalysisContext {
   AnalysisCache analysisCache;
 
   @override
+  final AnalysisOptionsImpl analysisOptions = new AnalysisOptionsImpl();
+
+  @override
   List<AnalysisTarget> explicitTargets = <AnalysisTarget>[];
 
   @override
   List<AnalysisTarget> priorityTargets = <AnalysisTarget>[];
 
   _InternalAnalysisContextMock() {
     analysisCache = new AnalysisCache([new UniversalCachePartition(this)]);
   }
 
   @override
@@ skipping 24 matching lines @@
       if (!skipInputs.contains(dependency) &&
           !evaluatedNodes.contains(dependency)) {
         return dependency;
       }
     }
     return null;
   }
 }
 
 class _WorkManagerMock extends TypedMock implements WorkManager {}