Add OCCURRENCES_CONTRIBUTOR_EXTENSION_POINT_ID.

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 'dart:core' hide Resource;
 import 'dart:math' show max;
@@ skipping 957 matching lines @@
               _getResolvedCompilationUnitToResendNotification(context, source);
           if (dartUnit != null) {
             switch (service) {
               case AnalysisService.HIGHLIGHTS:
                 sendAnalysisNotificationHighlights(this, file, dartUnit);
                 break;
               case AnalysisService.NAVIGATION:
                 sendAnalysisNotificationNavigation(this, context, source);
                 break;
               case AnalysisService.OCCURRENCES:
-                sendAnalysisNotificationOccurrences(this, file, dartUnit);
+                sendAnalysisNotificationOccurrences(this, context, source);
                 break;
               case AnalysisService.OUTLINE:
                 AnalysisContext context = dartUnit.element.context;
                 LineInfo lineInfo = context.getLineInfo(source);
                 sendAnalysisNotificationOutline(this, file, lineInfo, dartUnit);
                 break;
               case AnalysisService.OVERRIDES:
                 sendAnalysisNotificationOverrides(this, file, dartUnit);
                 break;
             }
@@ skipping 570 matching lines @@
   /**
    * The [PerformanceTag] for time spent in server request handlers.
    */
   static PerformanceTag serverRequests = new PerformanceTag('serverRequests');
 
   /**
    * The [PerformanceTag] for time spent in split store microtasks.
    */
   static PerformanceTag splitStore = new PerformanceTag('splitStore');
 }