Attempt to detect impact of disabling dns prefetching on transaction latency

This is also meant to exercise the field trial infrastructure.

r=mbelshe
Review URL: http://codereview.chromium.org/50084

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@12271 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed