What's this notification logo?

[l_smith331]

A friend sent me a screenshot today and I noticed a notification logo on the top left that I haven't seen before. It looked identical to the Google Chrome logo (the colored circle). What is this for?

 

[hallux]

Looks like an old Chromecast logo. Or maybe related to Chrome? What if the friend pulls down the notification shade, what items are there?

 

[l_smith331]

I'm not sure. I hate to ask him. I don't want to seem like one of those people. I was just curious what it may be. I don't think he has Chromecast on his phone though.