Supposedly there is a command line option in Chrome to specify a custom dns server.

  --dns-server=8.8.8.8

But it also looks like it doesn't always work (never worked, or is a special development mode only feature). Here is the bug report on it:

http://code.google.com/p/chromium/issues/detail?id=85875

comment 5 (in that thread, from the developer involved) says that it is working and testing it myself (google-chrome --dns-server=8.8.8.8) with wireshark shows that it does query that server.

(thanks for pointing this out; it wasn't what i was suggesting - i had assume the laptop was the op's own).