That's unlikely, as they currently do not offer certificates to the general public. I imagine if they do at some point, it might be as part of something like their version of Amazon's ACM for their Cloud offerings, or for custom domains on sites like Blogger. I'd expect both to be free. They're also a platinum sponsor of Let's Encrypt.
Google and Mozilla were heavy sponsors of LetsEncrypt (in money and in Mozilla's case manpower too) because they wanted to push out HTTPS more, and mandate HTTPS for some new HTML features. That would have been problematic if certificates weren't free or convenient.
In Mozilla's case, HTTPS is better for privacy. In Google's case, HTTPS makes it harder to substitude their ads.
