deleteCookies
Delete all cookies that match the specified parameters.
If both url and cookieName values are specified all host and domain cookies matching both will be deleted.
If only url is specified all host cookies (but not domain cookies) irrespective of path will be deleted.
If url is empty all cookies for all hosts and domains will be deleted.
Return
false if a non-empty invalid URL is specified or if cookies cannot be flushed.
Parameters
url
The cookie URL to delete or null.
cookieName
The cookie name to delete or null.