Change analysis server protocol to omit empty lists when optional.

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.
 
 library test.domain.analysis.abstract;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
@@ skipping 76 matching lines @@
 
   Index createIndex() {
     return null;
   }
 
   /**
    * Creates a project `/project`.
    */
   void createProject() {
     resourceProvider.newFolder(projectPath);
-    Request request = new AnalysisSetAnalysisRootsParams([projectPath],
-        []).toRequest('0');
+    Request request = new AnalysisSetAnalysisRootsParams(
+        included: [projectPath]).toRequest('0');
     handleSuccessfulRequest(request);
   }
 
   /**
    * Returns the offset of [search] in [testCode].
    * Fails if not found.
    */
   int findFileOffset(String path, String search) {
     File file = resourceProvider.getResource(path) as File;
     String code = file.createSource().contents.data;
@@ skipping 142 matching lines @@
     return waitForServerOperationsPerformed(server);
   }
 
   static String _getCodeString(code) {
     if (code is List<String>) {
       code = code.join('\n');
     }
     return code as String;
   }
 }