I do mention SafeBrowsing data in other reviews; if it didn't come up in the Chrome review, it may be the case that Chrome uses the Lookup API rather than the Update API. I would have to dig a bit more to confirm this.
I took another dip into Google last night. SafeBrowsing is hit, but it was hit much later than in other browsers from what I could tell. I believe I had to attempt navigation before it was called.