Google is the infamous search giant:
1) to which Microsoft now presents some competition, in the search engine industry, with Bing
2) already competing with Microsoft, in mobile operating systems industry
3) rumored to have lots of user data, as in some relation to Google AdSense(tm) technology.
4) which allows users to voluntarily opt in to browser history tracking, with such as Google Web History and the Google toolbar - and to my understanding, that feature is not enabled by default, the user actually has to opt into it, just as I've had to, for so much as search history tracking.
5) all of the above
It sounds to me like Microsoft may be suggesting some doubt towards companies collecting data about user browsing habits. I wouldn't be the least bit surprised, then, if Google may be the main FUD target they could have in mind, at that. Fortunately, though, no one company owns the discussion.