[whatwg] SQL API - SQLTransactionErrorCallback

[Brady Eidson]

A SQLTransactionErrorCallback object has a single method:
boolean handleEvent(in SQLError error);

This method is meant for both notifying of a failure in the  
transaction as well as for deciding it's fate - should we commit what  
we have, or just roll it back?
However, there's one problem - how does the script and it's  
SQLTransactionErrorCallback know which transaction is in question?

I propose we change SQLTransactionErrorCallback.handleEvent() to have  
the same signature as the SQLStatementErrorCallback, which is:
boolean handleEvent(in SQLTransaction transaction, in SQLError error);

Thanks,
~Brady