> abusing its dominance in search to benefit its own advertising business
Yeah, but those aren't separate businesses. They're the same thing. Google accepts questions (search queries) from users and gives them back answers (relevant information, including information from people who paid to be considered relevant). Even advertising embedded in pages is the same; the page information constitutes an expression of interest in a topic, and the advertisements are intended to answer that interest. That's one coherent business. It's not one I like, but that doesn't make them separate businesses.
You wouldn't accuse Schick of abusing its dominance in re-usable handles to benefit its own razor-selling business.