Changed DB to store node positions as Ordinals.

sync/syncable/syncable_id.h

Index: sync/syncable/syncable_id.h
diff --git a/sync/syncable/syncable_id.h b/sync/syncable/syncable_id.h
index 95157ab1213ce972eb4e5b623386f5a565b8562f..64fc7f695fe3ec3ec884e25fa6c54e8a1b2523f9 100644
--- a/sync/syncable/syncable_id.h
+++ b/sync/syncable/syncable_id.h
@@ -10,6 +10,7 @@
 #include <sstream>
 #include <string>
 
+#include "base/memory/scoped_ptr.h"
 #include "base/hash_tables.h"
 
 class MockConnectionManager;
@@ -111,7 +112,7 @@ class Id {
   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);