Enable the chunk storage engine

Summary: Ref T7149. This works now, so enable it.

Test Plan:
  - Uploaded large and small files in Firefox, Safari and Chrome.
  - Uploaded large files with `arc upload`.
  - Stopped/resumed large files with all clients.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T7149

Differential Revision: https://secure.phabricator.com/D12079

src/applications/files/controller/PhabricatorFileDropUploadController.php

@@ -61,7 +61,6 @@ final class PhabricatorFileDropUploadController
     // vanilla upload, so we need it.
     $data = PhabricatorStartup::getRawInput();
 
-
     $is_chunk_upload = $request->getBool('uploadchunk');
     if ($is_chunk_upload) {
       $params = array(