[whatwg] SQL API - SQLVersionChangeCallback vs SQLTransactionCallback

[Brady Eidson]

changeVersion() takes SQLVersionChangeCallback and  
SQLTransactionErrorCallback arguments.
transaction() takes SQLTransactionCallback and  
SQLTransactionErrorCallback arguments.

SQLVersionChangeCallback and SQLTransactionCallback have identical  
properties.

It is understood that a changeVersion() chain opens a transaction to  
perform your version change with, and besides the additional pre/post  
flight steps regarding the version change it operates the same as a  
transaction() chain.

I don't see the point of having a differentiated  
SQLVersionChangeCallback when SQLTransactionErrorCallback is good  
enough for the error case of changeVersion().  I propose we drop  
SQLVersionChangeCallback and modify the full signiture of  
changeVersion from:
void changeVersion(in DOMString oldVersion, in DOMString newVersion,  
in SQLVersionChangeCallback callback, in SQLTransactionErrorCallback  
errorCallback);
to:
void changeVersion(in DOMString oldVersion, in DOMString newVersion,  
in SQLTransactionCallback callback, in SQLTransactionErrorCallback  
errorCallback);

Thanks,
~Brady