Fix compiling of sync on linux.

chrome/browser/sync/engine/syncer_util.cc

 // Copyright (c) 2006-2008 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.
 
 #include "chrome/browser/sync/engine/syncer_util.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 281 matching lines @@
     Directory::ChildHandles handles;
     trans->directory()->GetChildHandles(trans, id, &handles);
     if (!handles.empty()) {
       // If we have still-existing children, then we need to deal with
       // them before we can process this change.
       LOG(INFO) << "Not deleting directory; it's not empty " << *entry;
       return CONFLICT;
     }
   }
 
-  int64 old_version = entry->Get(BASE_VERSION);
   SyncerUtil::UpdateLocalDataFromServerData(trans, entry);
 
   return SUCCESS;
 }
 
 // Pass in name and checksum because of UTF8 conversion.
 // static
 void SyncerUtil::UpdateServerFieldsFromUpdate(
     MutableEntry* local_entry,
     const SyncEntity& server_entry,
@@ skipping 521 matching lines @@
 
     // |update_entry| is considered to be somewhere after |candidate|, so store
     // it as the upper bound.
     closest_sibling = candidate.Get(ID);
   }
 
   return closest_sibling;
 }
 
 }  // namespace browser_sync