Remove contexts from the index.

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.
 
 library analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 45 matching lines @@
     AnalysisContext context = analysisServer.folderMap[contextFolder];
     if (context != null) {
       context.applyChanges(changeSet);
       analysisServer.schedulePerformAnalysisOperation(context);
     }
   }
 
   @override
   void removeContext(Folder folder) {
     AnalysisContext context = analysisServer.folderMap.remove(folder);
+    if (analysisServer.index != null) {
+      analysisServer.index.removeContext(context);
+    }
     analysisServer.sendContextAnalysisDoneNotifications(
         context,
         AnalysisDoneReason.CONTEXT_REMOVED);
   }
 
   @override
   void updateContextPackageMap(Folder contextFolder,
                                Map<String, List<Folder>> packageMap) {
     AnalysisContext context = analysisServer.folderMap[contextFolder];
     context.sourceFactory = _createSourceFactory(packageMap);
@@ skipping 847 matching lines @@
  * An object that is listening for lifecycle events from an analysis server.
  */
 abstract class AnalysisServerListener {
   /**
    * Analysis is complete.
    */
   void analysisComplete();
 }
 
 typedef void OptionUpdater(AnalysisOptionsImpl options);