There is a solution from ChromeFans:
http://www.chromefans.org/chrome-tutorial/direrct-download-google-chrome.htm

There is an official standalone version of the Google Chrome installer (some may call it an offline or direct installer). If you're having trouble installing from http://www.google.com/chrome, check out the link below to try this alternate installer:

http://www.google.com/support/installer/bin/answer.py?answer=126299