Reland "Use dev_server to determine the url of the devserver."

Condition for deploying required a scheduler restart.  Original
change was fine.

This reverts commit 5ca9d1b7a16b80d71acdbf01bd5b8019b13e3165.

BUG=chromium-os:26451
TEST=Unittests + local run with prod devservers

Change-Id: I9acd6bce50a8919f85ca3ed65420ad235e8501e7
Reviewed-on: https://gerrit.chromium.org/gerrit/28855
Reviewed-by: Chris Sosa <sosa@chromium.org>
Tested-by: Chris Sosa <sosa@chromium.org>
6 files changed