Remove the unused class SingleContextManager

pkg/analysis_server/lib/src/analysis_server.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 'dart:collection';
 import 'dart:core';
 import 'dart:io' as io;
 import 'dart:math' show max;
 
@@ skipping 18 matching lines @@
 import 'package:analysis_server/src/plugin/notification_manager.dart';
 import 'package:analysis_server/src/plugin/plugin_manager.dart';
 import 'package:analysis_server/src/plugin/plugin_watcher.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analysis_server/src/protocol_server.dart' as server;
 import 'package:analysis_server/src/server/diagnostic_server.dart';
 import 'package:analysis_server/src/services/correction/namespace.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analysis_server/src/services/search/search_engine_internal2.dart';
-import 'package:analysis_server/src/single_context_manager.dart';
 import 'package:analysis_server/src/utilities/null_string_sink.dart';
 import 'package:analyzer/context/context_root.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/exception/exception.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:analyzer/plugin/resolver_provider.dart';
 import 'package:analyzer/source/pub_package_map_provider.dart';
@@ skipping 348 matching lines @@
       this.resourceProvider,
       PubPackageMapProvider packageMapProvider,
       this.index,
       this.serverPlugin,
       this.options,
       this.sdkManager,
       this.instrumentationService,
       {this.diagnosticServer,
       ResolverProvider fileResolverProvider: null,
       ResolverProvider packageResolverProvider: null,
-      bool useSingleContextManager: false,
       this.rethrowExceptions: true})
       : notificationManager =
             new NotificationManager(channel, resourceProvider) {
     _performance = performanceDuringStartup;
 
     pluginManager = new PluginManager(
         resourceProvider,
         _getByteStorePath(),
         sdkManager.defaultSdkDirectory,
         notificationManager,
@@ skipping 22 matching lines @@
       }
       _analysisPerformanceLogger = new PerformanceLog(sink);
     }
     byteStore = _createByteStore();
     analysisDriverScheduler = new nd.AnalysisDriverScheduler(
         _analysisPerformanceLogger,
         driverWatcher: pluginWatcher);
     analysisDriverScheduler.status.listen(sendStatusNotificationNew);
     analysisDriverScheduler.start();
 
-    if (useSingleContextManager) {
-      contextManager = new SingleContextManager(resourceProvider, sdkManager,
-          packageResolverProvider, analyzedFilesGlobs, defaultContextOptions);
-    } else {
-      contextManager = new ContextManagerImpl(
-          resourceProvider,
-          sdkManager,
-          packageResolverProvider,
-          packageMapProvider,
-          analyzedFilesGlobs,
-          instrumentationService,
-          defaultContextOptions);
-    }
+    contextManager = new ContextManagerImpl(
+        resourceProvider,
+        sdkManager,
+        packageResolverProvider,
+        packageMapProvider,
+        analyzedFilesGlobs,
+        instrumentationService,
+        defaultContextOptions);
     this.fileResolverProvider = fileResolverProvider;
     this.packageResolverProvider = packageResolverProvider;
     ServerContextManagerCallbacks contextManagerCallbacks =
         new ServerContextManagerCallbacks(this, resourceProvider);
     contextManager.callbacks = contextManagerCallbacks;
     AnalysisEngine.instance.logger = new AnalysisLogger(this);
     _onAnalysisStartedController = new StreamController.broadcast();
     _onFileAnalyzedController = new StreamController.broadcast();
     // temporary plugin support:
     _onFileAddedController = new StreamController.broadcast();
@@ skipping 1403 matching lines @@
   /**
    * The [PerformanceTag] for time spent in server request handlers.
    */
   static PerformanceTag serverRequests = server.createChild('requests');
 
   /**
    * The [PerformanceTag] for time spent in split store microtasks.
    */
   static PerformanceTag splitStore = new PerformanceTag('splitStore');
 }