http://news.zdnet.com/2424-9595_22-221124.html

[<<A great post over at Scott Hanselman's blog goes into some detail of the Microsoft code Google has included in Chrome. It's all street-legal: the code was made available under a very permissive open source licence back in 2004, and may be the first of Microsoft's steps in that direction. >>

Details: http://www.hanselman.com/blog/TheWeeklySourceCode33MicrosoftOpenSourceInsideGoogleChrome.aspx]

M$FT's code is open source, Chrome is open source.

Isn't the whole point of Open Source is that other people can use and improve your code? Google has even said that they expect Mozilla, M$FT and Opera to use their code.