Remove uses of the old plugin model from the analysis server

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.
 
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_constants.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/domain_server.dart';
-import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:plugin/manager.dart';
 import 'package:plugin/plugin.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
@@ skipping 56 matching lines @@
           break;
         default:
           if (!notificationTypesReceived.add(notificationType)) {
             fail('Notification type $notificationType received more than once');
           }
           break;
       }
     }
   }
 
-  void processRequiredPlugins(ServerPlugin serverPlugin) {
+  void processRequiredPlugins() {
     List<Plugin> plugins = <Plugin>[];
     plugins.addAll(AnalysisEngine.instance.requiredPlugins);
-    plugins.add(serverPlugin);
 
     ExtensionManager manager = new ExtensionManager();
     manager.processPlugins(plugins);
   }
 
   void setUp() {
-    ServerPlugin serverPlugin = new ServerPlugin();
-    processRequiredPlugins(serverPlugin);
+    processRequiredPlugins();
     channel = new MockServerChannel();
     resourceProvider = new MemoryResourceProvider();
     // Create an SDK in the mock file system.
     new MockSdk(resourceProvider: resourceProvider);
     packageMapProvider = new MockPackageMapProvider();
     server = new AnalysisServer(
         channel,
         resourceProvider,
         packageMapProvider,
-        serverPlugin,
         new AnalysisServerOptions(),
         new DartSdkManager('/', false),
         InstrumentationService.NULL_SERVICE);
   }
 
   Future test_echo() {
     server.handlers = [new EchoHandler()];
     var request = new Request('my22', 'echo');
     return channel.sendRequest(request).then((Response response) {
       expect(response.id, equals('my22'));
@@ skipping 88 matching lines @@
 
 class EchoHandler implements RequestHandler {
   @override
   Response handleRequest(Request request) {
     if (request.method == 'echo') {
       return new Response(request.id, result: {'echo': true});
     }
     return null;
   }
 }