Not many are aware of this Easter egg in Google's very own browser Chrome. One of the reasons I am assuming it to be this way could be because this may be something that might have been plugged in quite late - in the later versions. There is one more logo hidden in Google Chrome's. Its a high quality - premium version of the same logo, but GOLDEN.
All you need to do is right click on the Chrome logo and click properties. Once you are on the Google Chromes Properties dialog click on the Change Icon button under the Shortcut tab.