yeah, it only mentioned this about a deprecating feature: "pen.js:9 [Deprecation] getCurrentPosition and watchPosition usage in cross-origin iframes is deprecated and will be disabled in M63, around December 2017. To continue to use this feature, it must be enabled by the embedding document using Feature Policy, e.g. <iframe allow="geolocation" ...>. See https://goo.gl/EuHzyv for more details."
but that shouldn't matter, AFAIK, since it would still work until that function gets turned off in some future build.