Reverse the sense of the flag to make it easier to find test that need to be converted

pkg/analysis_server/test/analysis_abstract.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.
 
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart'
     hide AnalysisOptions;
 import 'package:analysis_server/src/analysis_server.dart';
@@ skipping 34 matching lines @@
     }
     length++;
   }
   return length;
 }
 
 /**
  * An abstract base for all 'analysis' domain tests.
  */
 class AbstractAnalysisTest {
-  bool enableNewAnalysisDriver = false;
   bool generateSummaryFiles = false;
   MockServerChannel serverChannel;
   MemoryResourceProvider resourceProvider;
   MockPackageMapProvider packageMapProvider;
   TestPluginManager pluginManager;
   AnalysisServer server;
   RequestHandler handler;
 
   final List<ServerErrorParams> serverErrors = <ServerErrorParams>[];
   final List<GeneralAnalysisService> generalServices =
       <GeneralAnalysisService>[];
   final Map<AnalysisService, List<String>> analysisSubscriptions = {};
 
   String projectPath;
   String testFolder;
   String testFile;
   String testCode;
 
   AbstractAnalysisTest();
 
   AnalysisDomainHandler get analysisHandler => server.handlers
       .singleWhere((handler) => handler is AnalysisDomainHandler);
 
   AnalysisOptions get analysisOptions => enableNewAnalysisDriver
       ? testDiver.analysisOptions
       : testContext.analysisOptions;
 
+  bool get enableNewAnalysisDriver => true;
+
   AnalysisContext get testContext => server.getAnalysisContext(testFile);
 
   AnalysisDriver get testDiver => server.getAnalysisDriver(testFile);
 
   void addAnalysisSubscription(AnalysisService service, String file) {
     // add file to subscription
     var files = analysisSubscriptions[service];
     if (files == null) {
       files = <String>[];
       analysisSubscriptions[service] = files;
@@ skipping 259 matching lines @@
       plugin.AnalysisUpdateContentParams params) {
     analysisUpdateContentParams = params;
   }
 
   @override
   Future<List<Null>> stopAll() async {
     fail('Unexpected invocation of stopAll');
     return null;
   }
 }