Populate versions on individual nodes in sync model and native bookmark model.

sync/internal_api/public/read_transaction.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_READ_TRANSACTION_H_
 #define SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_
 
 #include "base/compiler_specific.h"
 #include "sync/internal_api/public/base_transaction.h"
 
@@ skipping 14 matching lines @@
                   UserShare* share);
 
   // Resume the middle of a transaction. Will not close transaction.
   ReadTransaction(UserShare* share, syncable::BaseTransaction* trans);
 
   virtual ~ReadTransaction();
 
   // BaseTransaction override.
   virtual syncable::BaseTransaction* GetWrappedTrans() const OVERRIDE;
 
-  // Return |transaction_version| of |type| stored in sync directory's
-  // persisted info.
-  int64 GetModelVersion(ModelType type);
-
  private:
   void* operator new(size_t size);  // Transaction is meant for stack use only.
 
   // The underlying syncable object which this class wraps.
   syncable::BaseTransaction* transaction_;
   bool close_transaction_;
 
   DISALLOW_COPY_AND_ASSIGN(ReadTransaction);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_