They do collect data from chrome (see their privacy policy), but the point you're making isn't too convincing. Having people use Chrome has a number of benefits

They do collect data from chrome (see their privacy policy), but the point you're making isn't too convincing. Having people use Chrome has a number of benefits for google.. from saving money paying browsers to make google the default; to protecting Google from any anti-google moves Microsoft might make in the future using IE. Without Chrome, Google's business is very dependent on a third-party (the browser developer) who has no loyalty to Google. Long term, it's in google's interest to eliminate such variables in their business.