I just tested it. Setting up Chrome Remote Desktop requires installing a separate package which Chrome downloads for you. When it's enabled, there are indeed

I just tested it. Setting up Chrome Remote Desktop requires installing a separate package which Chrome downloads for you. When it's enabled, there are indeed two always-running processes located under /Library/PrivilegedHelperTools/ChromeRemoteDesktopHost.app, which are apparently launched thanks to /Library/LaunchAgents/org.chromium.chromoting.plist. But those weren't running before I set up Remote Desktop; I imagine they were installed as part of the package and didn't exist before. If I disable Remote Desktop again… well, it doesn't actually delete the LaunchAgents plist or ChromeRemoteDesktopHost.app. That's rude. But it does make the processes stop running. (To be totally clear, Chrome's updater does run in the background, though not all the time.)