Issue 20240. Use a FileManager that manages its own temporary directory.

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 675 matching lines @@
    * This method is called when analysis of the given [AnalysisContext] is
    * cancelled.
    */
   void sendContextAnalysisCancelledNotifications(AnalysisContext context, String message) {
     Completer completer = contextAnalysisDoneCompleters.remove(context);
     if (completer != null) {
       completer.completeError(message);
     }
   }
 
+  void shutdown() {
+    running = false;
+    if (index != null) {
+      index.clear();
+      index.stop();
+    }
+  }
+
   /**
    * Return the [CompilationUnit] of the Dart file with the given [path].
    * Return `null` if the file is not a part of any context.
    */
   CompilationUnit test_getResolvedCompilationUnit(String path) {
     // prepare AnalysisContext
     AnalysisContext context = getAnalysisContext(path);
     if (context == null) {
       return null;
     }
@@ skipping 46 matching lines @@
 /**
  * An enumeration of the services provided by the server domain.
  */
 class ServerService extends Enum2<ServerService> {
   static const ServerService STATUS = const ServerService('STATUS', 0);
 
   static const List<ServerService> VALUES = const [STATUS];
 
   const ServerService(String name, int ordinal) : super(name, ordinal);
 }