Pass a VoidCallback to Database::transaction and Database::changeVersion.
        This is not yet hooked up to the database machinery.
        
        * WebCore.vcproj/WebCore.vcproj:
        * bindings/js/JSDatabaseCustom.cpp:
        (WebCore::JSDatabase::changeVersion):
        (WebCore::JSDatabase::transaction):
        * storage/Database.cpp:
        (WebCore::Database::changeVersion):
        (WebCore::Database::transaction):
        * storage/Database.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@27832 268f45cc-cd09-0410-ab3c-d52691b4dbfc