TORONTO — When University of Toronto engineering professor Parham Aarabi first began researching face tracking technology, it never occurred to him that his resulting startup would later be snapped up by the world's biggest cosmetics company, L'Oreal.In fact, Aarabi thought the initial application of what is now ModiFace's lip and eye tracking capabilities would be speech recognition in noisy environments, he said. "What happened was I realized, and we initially realized, that this technology had a lot of use for cosmetic simulations,'' said Aarabi, ModiFace's chief executive, in an interview.