That had a very specific meaning in context. He was asking if Google used Yelp's content to build its Places content, in which case Google would be using its capacity as a Search company in order to grant its Places division a competitive (anti-competitive?) advantage against Yelp. If simultaneously it can be shown that Search was favoring bringing attention to Places over Yelp, there might be an anti-trust case.

There's a lot of posts on here about how uninformed the politicians seem to be. We seem to forget that _we're_ the ones who are uninformed of the vast technicality that is anti-trust law and the oceans of oratorical precision required in order to establish a legal case.