Send 'analysis.errors' notification only for files in analysis roots.

pkg/analysis_server/lib/src/operation/operation_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 operation.analysis;
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computer/computer_highlights.dart';
 import 'package:analysis_server/src/computer/computer_navigation.dart';
 import 'package:analysis_server/src/computer/computer_occurrences.dart';
@@ skipping 140 matching lines @@
         if (server.hasAnalysisSubscription(AnalysisService.OCCURRENCES, file)) {
           sendAnalysisNotificationOccurrences(server, file, dartUnit);
         }
         if (server.hasAnalysisSubscription(AnalysisService.OUTLINE, file)) {
           sendAnalysisNotificationOutline(server, context, source, dartUnit);
         }
         if (server.hasAnalysisSubscription(AnalysisService.OVERRIDES, file)) {
           sendAnalysisNotificationOverrides(server, file, dartUnit);
         }
       }
-      // TODO(scheglov) use default subscriptions
-      if (!source.isInSystemLibrary) {
+      if (server.shouldSendErrorsNotificationFor(file)) {
         sendAnalysisNotificationErrors(
             server,
             file,
             notice.lineInfo,
             notice.errors);
       }
     }
   }
 
   void updateIndex(Index index, List<ChangeNotice> notices) {
@@ skipping 11 matching lines @@
       // HTML
       {
         HtmlUnit htmlUnit = notice.htmlUnit;
         if (htmlUnit != null) {
           index.indexHtmlUnit(context, htmlUnit);
         }
       }
     }
   }
 }