As of 2020, Chromium was made more permissive in accepting additional code. Before this, Chromium rejected a lot of outside code. Microsoft is now the biggest contributor outside of Google. Samsung, Intel, ARM and Apple are other notable contributors. There are several features found in the code that aren't used by Google at all. Chrome is 100% Google's agenda. Chromium does include Google services that Google rejects the removal of. Of course Google would rather you use them. Microsoft just removes them. As do others. But the features others have submitted to the Chromium code are of course used in their forks and possibly others. I would say Chromium is less of Google's agenda than it used to be. As it's not entirely neutral, there is still Google influence behind it.