Add OCCURRENCES_CONTRIBUTOR_EXTENSION_POINT_ID.

pkg/analysis_server/lib/plugin/occurrences.dart

Index: pkg/analysis_server/lib/plugin/occurrences.dart
diff --git a/pkg/analysis_server/lib/plugin/navigation.dart b/pkg/analysis_server/lib/plugin/occurrences.dart
similarity index 58%
copy from pkg/analysis_server/lib/plugin/navigation.dart
copy to pkg/analysis_server/lib/plugin/occurrences.dart
index 23603f06f64e87eb893e38918fa0abc430d1f97d..5339ccc4cc08fb059b7fe40a63a653eefa0818c2 100644
--- a/pkg/analysis_server/lib/plugin/navigation.dart
+++ b/pkg/analysis_server/lib/plugin/occurrences.dart
@@ -4,19 +4,19 @@
 
 /**
  * Support for client code that extends the analysis server by adding new
- * navigation contributors.
+ * occurrences contributors.
  */
-library analysis_server.plugin.navigation;
+library analysis_server.plugin.occurrences;
 
-import 'package:analysis_server/analysis/navigation/navigation_core.dart';
+import 'package:analysis_server/analysis/occurrences_core.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:plugin/plugin.dart';
 
 /**
  * The identifier of the extension point that allows plugins to register
- * navigation contributors. The object used as an extension must be
- * a [NavigationContributor].
+ * element occurrences. The object used as an extension must be
+ * a [OccurrencesContributor].
  */
-final String NAVIGATION_CONTRIBUTOR_EXTENSION_POINT_ID = Plugin.join(
+final String OCCURRENCES_CONTRIBUTOR_EXTENSION_POINT_ID = Plugin.join(
     ServerPlugin.UNIQUE_IDENTIFIER,
-    ServerPlugin.NAVIGATION_CONTRIBUTOR_EXTENSION_POINT);
+    ServerPlugin.OCCURRENCES_CONTRIBUTOR_EXTENSION_POINT);