[indexeddb] error value of open request after aborting VERSION_CHANGE transaction inside an onupgradeneeded handler

[Israel Hilerio]

What should be the value of the error attribute on the open request after a 
VERSION_CHANGE transaction is aborted?  We're thinking it should be AbortError 
independent of whether the transaction is aborted programmatically or due to a 
system failure.

Do you guys agree?

Israel