Changed DB to store node positions as Ordinals.

sync/syncable/syncable_id.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_SYNCABLE_SYNCABLE_ID_H_
 #define SYNC_SYNCABLE_SYNCABLE_ID_H_
 
 #include <iosfwd>
 #include <limits>
 #include <sstream>
 #include <string>
 
+#include "base/memory/scoped_ptr.h"
 #include "base/hash_tables.h"
 
 class MockConnectionManager;
 
 namespace base {
 class StringValue;
 }
 
 namespace sql {
 class Statement;
@@ skipping 81 matching lines @@
   // This should only be used if you get back a reference to a local
   // id from the server. Returns a client only opaque id.
   static Id CreateFromClientString(const std::string& local_id);
 
   // This method returns an ID that will compare less than any valid ID.
   // The returned ID is not a valid ID itself.  This is useful for
   // computing lower bounds on std::sets that are ordered by operator<.
   static Id GetLeastIdForLexicographicComparison();
 
  private:
-  friend EntryKernel* UnpackEntry(sql::Statement* statement);
+  friend scoped_ptr<EntryKernel> UnpackEntry(sql::Statement* statement);
   friend void BindFields(const EntryKernel& entry,
                          sql::Statement* statement);
   friend std::ostream& operator<<(std::ostream& out, const Id& id);
   friend class MockConnectionManager;
   friend class SyncableIdTest;
 
   std::string s_;
 };
 
 Id GetNullId();
 
 }  // namespace syncable
 }  // namespace syncer
 
 #endif  // SYNC_SYNCABLE_SYNCABLE_ID_H_