Remove uses of the old plugin model from the analysis server

pkg/analysis_server/test/domain_execution_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 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/domain_execution.dart';
-import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
-import 'package:plugin/manager.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'analysis_abstract.dart';
 import 'mocks.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(ExecutionDomainTest);
   });
   group('ExecutionDomainHandler', () {
     MemoryResourceProvider provider = new MemoryResourceProvider();
     AnalysisServer server;
     ExecutionDomainHandler handler;
 
     setUp(() {
-      ExtensionManager manager = new ExtensionManager();
-      ServerPlugin serverPlugin = new ServerPlugin();
-      manager.processPlugins([serverPlugin]);
       server = new AnalysisServer(
           new MockServerChannel(),
           provider,
           new MockPackageMapProvider(),
-          serverPlugin,
           new AnalysisServerOptions(),
           new DartSdkManager('', false),
           InstrumentationService.NULL_SERVICE);
       handler = new ExecutionDomainHandler(server);
     });
 
     group('createContext/deleteContext', () {
       test('create/delete multiple contexts', () {
         Request request =
             new ExecutionCreateContextParams('/a/b.dart').toRequest('0');
@@ skipping 190 matching lines @@
  * A [Source] that knows it's [fullName].
  */
 class TestSource implements Source {
   String fullName;
 
   TestSource(this.fullName);
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }