GitLab

There is no reason chromium builds should hit Google servers by
default. While at it, make the auto-enrollment mode decisions more explicit in the code.

BUG=chromium:358585

Review URL: https://codereview.chromium.org/220933003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@261525 0039d316-1c4b-4281-b951-d872f2087c98