There already exists a mirror list at https://www.torproject.org/getinvolved/mirrors.html.en. Of course this is hard to come by, when the whole torproject website is being censored.
https://en.wikipedia.org/wiki/Internet_censorship_in_the_Peo...
So I think they would ban Google Search over this if they had to, but it sounds like Google would just hide it on Google.cn.
https://en.wikipedia.org/wiki/List_of_websites_blocked_in_Ch... is another interesting read, the first 6 URLs are Google products.
One of which is Google+, every cloud has a silver lining.