Use standard infrastructure for Audit search indexing

Summary: Ref T4896.

Test Plan: Made an unusual comment, then found it by searching.

Reviewers: btrahan, joshuaspence

Reviewed By: btrahan, joshuaspence

Subscribers: epriestley

Maniphest Tasks: T4896

Differential Revision: https://secure.phabricator.com/D10110

src/applications/audit/editor/PhabricatorAuditCommentEditor.php

@@ -263,9 +263,6 @@ final class PhabricatorAuditCommentEditor extends PhabricatorEditor {
       $this->publishFeedStory($comment, $feed_phids);
     }
 
-    id(new PhabricatorSearchIndexer())
-      ->queueDocumentForIndexing($commit->getPHID());
-
     if (!$this->noEmail) {
       $this->sendMail(
         $comments,

src/applications/audit/editor/PhabricatorAuditEditor.php

@@ -111,4 +111,8 @@ final class PhabricatorAuditEditor
     return array_values(array_merge($head, $tail));
   }
 
+  protected function supportsSearch() {
+    return true;
+  }
+
 }