Sounds like they mean “remote” because chromium uses SQLite and JavaScript loaded into your machine comes from a remote source. So because a website can run JS that can exploit chromium they’re calling it an RCE.
Yeah it seems like RCE in the context of Chromium, but not SQLite? I know it’s pedantic but if this is RCE in SQLite because it’s exposed to the network via other software, every vulnerability is “remote” because you may expose it via other software.