Handle response sent by browser.

def response_handler(msg: Dict[str, str]) -> None:
    """Handle response sent by browser."""
    from wdom.document import getElementByWdomId
    id = msg['id']
    elm = getElementByWdomId(id)
    if elm:
        elm.on_response(msg)
    else:
        logger.warning('No such element: wdom_id={}'.format(id))