http://en.wikipedia.org/wiki/Chromium_(web_browser)#Differences_from_Google_Chrome
Différences entre Chromium et Chrome :
[...]
RLZ tracking when Chrome is downloaded as part of marketing promotions and distribution partnerships. This transmits information in encoded form to Google, including when and from where Chrome has been downloaded. In June 2010, Google confirmed that the RLZ tracking token is not present in versions of Chrome downloaded from the Google website directly or in any version of Chromium. The RLZ source code was also made open source at the same time so that developers can confirm what it is and how it works.
En allant voir la référence...
http://blog.chromium.org/g/2010/06/in-open-for-rlz.html
Je cite :
"RLZ gives us the ability to accurately measure the success of marketing promotions and distribution partnerships in order to meet our contractual and financial obligations. It assigns non-unique, non-personally identifiable promotion tracking labels to client products; these labels sometimes appear in Google search queries in Google Chrome."
Je dois traduire où c'est assez clair ?