The suggestions are from your default search engine, set from Just Type and Web preferences (they're actually control the same option). Your Just Type search provider must provide a search suggestion URL for this to work. To check, go to Card View and hit Just Type, and start typing anything. When the results list appear, look beside the entry for your default search engine and see if there's a Suggest button.
Интересно, с Яндексом получится скрестить?
Вот как это выглядит:
