I've long thought that the need for a high performance sandboxed JavaScript VM was the real impetus for Google's investment in v8, and that Chrome was just a useful opportunity to leverage it and to get external contribution. Is there any evidence that this is the case?
Unlikely. I was using SpiderMonkey to execute JavaScript in Google's indexing pipeline long before I had heard about v8, and I doubt Lars had me in mind when he started on v8. Of course, I tele-conferenced with Lars before Chrome was released, but SpiderMonkey was still the indexing system's JavaScript interpreter on Chrome's go-live date.
