Google Chrome extension for custom DNS

I would like you to create a Google Chrome extension, which, after loading, forces Google Chrome to use custom DNS server. When the extension is active, Google Chrome will flush it's current host cache (DNS cache) and it will use DNS server 8.8.8.8 for all further domain lookups. When the extension is inactive (disabled), Google Chrome will use the DNS server which is set in the system as usual. There doesn't have to be any user-interface to enable/disable the extension - the user will simply do that manually in chrome://extensions/ Beware: I do not know if such extension can be even written. So if you are not sure if it is possible to develop such extension, do not bid on this project. Only bid if you know how to do it, then it is very easy money.