Remove #pragma once from sync

sync/internal_api/public/base_node.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_INTERNAL_API_PUBLIC_BASE_NODE_H_
 #define SYNC_INTERNAL_API_PUBLIC_BASE_NODE_H_
-#pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "googleurl/src/gurl.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/protocol/sync.pb.h"
@@ skipping 228 matching lines @@
 
   // Same as |unencrypted_data_|, but for legacy password encryption.
   scoped_ptr<sync_pb::PasswordSpecificsData> password_data_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseNode);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_BASE_NODE_H_