Any browser is a massive, rich attack surface with bugs, but Chrome has been cutting edge in its sandboxing, privilege separation, and overall security.
True, Chrome is and has always been a Google marketing vehicle, where the user is the product. But has Mozilla always been at the forefront of privacy, even? Something as basic as private browsing, let's see:
April 29, 2005 Safari 2.0 Private Browsing
December 11, 2008 Google Chrome 1.0 Incognito
March 19, 2009 Internet Explorer 8 InPrivate Browsing
June 30, 2009 Mozilla Firefox 3.5 Private Browsing
Apple, Google, and Microsoft all beat Mozilla to the punch.