They have the Trust API changes they are trying to push, which I believe they may try to make websites only support browsers using that API. They have a largest user base already so they have some sway, if Chrome won’t load your webpage, you business might be dead.
Couple that with their anti ad blocking extension, users have to use Chrome to access webpages and can’t block ads on those pages.
Mildly tinfoil-hatty, but I think within the realm of possibility.