Ответ Гугла:
We know this is a long-standing issue, and we see where you're coming from. Please know that your security is our highest priority, and our decision not to implement the master password feature is based on our belief that it creates a false sense of security instead of actually providing a strong security benefit.
www.google.com/support/forum/p/Chrome/thread?tid=5f249c4fa04ecd17&hl=en 
