Add --enable-incremental-resolution option.

pkg/analysis_server/test/analysis_server_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 test.analysis_server;
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/domain_server.dart';
 import 'package:analysis_server/src/operation/operation.dart';
@@ skipping 187 matching lines @@
   MemoryResourceProvider resourceProvider;
 
   AnalysisServerTestHelper({bool rethrowExceptions: true}) {
     channel = new MockServerChannel();
     resourceProvider = new MemoryResourceProvider();
     server = new AnalysisServer(
         channel,
         resourceProvider,
         new MockPackageMapProvider(),
         null,
+        new AnalysisServerOptions(),
         new MockSdk(),
         rethrowExceptions: rethrowExceptions);
   }
 }
 
 class EchoHandler implements RequestHandler {
   @override
   Response handleRequest(Request request) {
     if (request.method == 'echo') {
       return new Response(request.id, result: {
         'echo': true
       });
     }
     return null;
   }
 }