Change HashMap declarations back to Map.

pkg/analysis_server/lib/src/domain_analysis.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 domain.analysis;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analysis_server/src/analysis_server.dart';
@@ skipping 62 matching lines @@
     List<String> files = filesDatum.asStringList();
     server.setPriorityFiles(request, files);
     return new Response(request.id);
   }
 
   /**
    * Implement the 'analysis.setSubscriptions' request.
    */
   Response setSubscriptions(Request request) {
     // parse subscriptions
-    HashMap<AnalysisService, Set<String>> subMap;
+    Map<AnalysisService, Set<String>> subMap;
     {
       RequestDatum subDatum = request.getRequiredParameter(SUBSCRIPTIONS);
-      HashMap<String, List<String>> subStringMap = subDatum.asStringListMap();
+      Map<String, List<String>> subStringMap = subDatum.asStringListMap();
       subMap = new HashMap<AnalysisService, Set<String>>();
       subStringMap.forEach((String serviceName, List<String> paths) {
         AnalysisService service = Enum2.valueOf(AnalysisService.VALUES,
             serviceName);
         if (service == null) {
           throw new RequestFailure(new Response.unknownAnalysisService(request,
               serviceName));
         }
         subMap[service] = new HashSet.from(paths);
       });
@@ skipping 98 matching lines @@
 
 /**
  * A description of the change to the content of a file.
  */
 class ContentChange {
   String content;
   int offset;
   int oldLength;
   int newLength;
 }