From what I understand the list is part of the ChromeBot Tool, a sub-project of Chromium.
ChromeBot is a distributed crash detection system.
Chrome is run on a list of URLs to check for crashes. A
pool of machines is used to distribute the workload,
each machine might potentially launch several instances
of Chrome. Crashes detected are symbolicated and saved
in database.
Never heard of that one, spiegel.de and amazon.de should be
much more popular. The reason that google in the first entries might be that about 2.3% of all URLs in the list are google or facebook domains.