[webdatabase] changeVersion should allow all callbacks to be optional

   The spec currently requires the first 2 callbacks for the 
changeVersion method, while the 3rd is optional.  The spec should make 
all of the callbacks optional so authors don't resort to specifying 
empty functions when they don't actually need to do anything with it.

Lachlan Hunt - Opera Software

Received on Friday, 28 August 2009 12:36:47 UTC