Show update screen for non-official build because update is enabled for non-official build there is no sense to skip OOBE update screen.
Show update screen for non-official build
because update is enabled for non-official build there is no sense to skip OOBE update screen.

BUG=cromium-os:4002, cromium-os:4003
TEST=Install older Chromium OS build on device, start dev server with
new image (./start_devserver --client_prefix ChromeOSUpdateEngine),
remove Local State and .oobe_completed files.

Review URL: http://codereview.chromium.org/3192014

git-svn-id: http://src.chromium.org/svn/trunk/src@57184 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 9903860c851fd989eee3393aa8a9154fd1e154b5
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser