Again, highlights the differences between Google's and Apple's philosophy. I would still believe it would be harder to hack into Chrome and Android, although as its been proven, its not impossible.
Google likes to believe there is an algorithm for everything and they don't believe in human intervention and such. That's why the Android Market does not have human policing but instead tries to relay as much on built in protection mechanisms within Android. Its also the reason why Google left China, since censorship requires human policing and cannot be decided by algorithm. Even if the Android Market will get some kind of "police" chances are this policing is done by algorithm bots rather than blood and flesh humans.