Change HashMap declarations back to Map.

pkg/analysis_server/lib/src/domain_analysis.dart

Index: pkg/analysis_server/lib/src/domain_analysis.dart
diff --git a/pkg/analysis_server/lib/src/domain_analysis.dart b/pkg/analysis_server/lib/src/domain_analysis.dart
index 184af19108e8eb95cd4005b644dc02968ba3844d..c153735c579dfea141964c7e6e8bb2010cc087e9 100644
--- a/pkg/analysis_server/lib/src/domain_analysis.dart
+++ b/pkg/analysis_server/lib/src/domain_analysis.dart
@@ -80,10 +80,10 @@ class AnalysisDomainHandler implements RequestHandler {
    */
   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,