I'm using the Mac version of Chrome (Version 69.0.3497.81 (Official Build) (64-bit) to be pedantic).
Up until two days ago, logging into gmail and logging into chrome were two different things, as they obviously are (one is a web service the other is a web browser, to be pedantic again)
I would usually be logged into gmail in the browser, but would only log into Chrome on special occasions and/or with specific accounts.
As of today, if I hit www.gmail.com and log in, I'm automatically logged into Chrome. If I log out of Chrome, I'm also logged out of gmail.
This can't be a bug... can it?