void webkit_authentication_request_set_proposed_credential ( WebKitAuthenticationRequest* request, WebKitCredential* credential )
WebKitCredential of the proposed authentication challenge that was
stored from a previous session. This should only be used by applications handling
their own credential storage. (When using the default WebKit credential storage,
webkit_authentication_request_get_proposed_credential() already contains previously-stored
credential will clear the proposed credential.
|The data is owned by the caller of the function.|