Some things Chrome includes that other browsers do not: Pepper, Native Client, Chrome Web Store, WebSQL (Safari might have that one too), a native PDF viewer, SwiftShader, etc.
(People of course disagree on which of those are bad and which are good.)
It's only in the Dartium branch so far, I believe - not in trunk Chromium or release Chrome. But yes, it's another controversial feature that Google is planning to bundle.
