Remove #pragma once from sync

sync/api/fake_syncable_service.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_API_FAKE_SYNCABLE_SERVICE_H_
 #define SYNC_API_FAKE_SYNCABLE_SERVICE_H_
-#pragma once
 
 #include "sync/api/syncable_service.h"
 
 namespace syncer {
 
 class SyncErrorFactory;
 
 // A fake SyncableService that can return arbitrary values and maintains the
 // syncing status.
 class FakeSyncableService : public SyncableService {
@@ skipping 25 matching lines @@
   scoped_ptr<SyncChangeProcessor> sync_processor_;
   SyncError merge_data_and_start_syncing_error_;
   SyncError process_sync_changes_error_;
   bool syncing_;
   syncer::ModelType type_;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_API_FAKE_SYNCABLE_SERVICE_H_