Callback for asynchronous continuation of skip(). If |bytes_skipped| > 0 then either skip() will be called again until the requested number of bytes have been skipped or the request will proceed. If |bytes_skipped| <= 0 the request will fail with ERR_REQUEST_RANGE_NOT_SATISFIABLE.
Callback for asynchronous continuation of cef_resource_handler_t::read().
Base structure.