Remove #pragma once from sync

sync/engine/download_updates_command.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SYNC_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_
 #define SYNC_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "sync/engine/syncer_command.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/internal_api/public/engine/model_safe_worker.h"
 #include "sync/protocol/sync.pb.h"
 
 namespace sync_pb {
@@ skipping 37 matching lines @@
       sync_pb::DebugInfo* debug_info);
 
   const bool create_mobile_bookmarks_folder_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadUpdatesCommand);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_