In the past month, Google has advertised on the new tab page for their chrome book using a mechanism for emergency updates (in some cases people can't close the ad), and started a fight in the chromium community about supporting Dart directly. Neither one is a major offence but both exhibit they have their own interests at heart.
Spdy is another good example. (I like Spdy, and I think its a good idea, but...) SPDY™ is trademarked to Google. It currently has no rfc. (Just a mostly empty draft. http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00.htm... ) It was developed internally and not opened to comments. They control the largest implementations both server and client side. And while they're selling it as a way for everyone to make the web faster, they still have full control. (Apache support is here, nginx doesn't support it, Amazon uses it heavily for the kindle fire.)