Using 'sudo' to start the per-user process ensures the
ulimits (and hopefully other environment settings) are set
properly.
BUG=169802
Review URL: https://chromiumcodereview.appspot.com/15848019
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205486 0039d316-1c4b-4281-b951-d872f2087c98