* Leave ui.conf there, not run by default.
* dump autotest log into /dev/tty1
* Don't let tty1 eat keayboard events.
Review URL: http://codereview.chromium.org/1742018
Dropping caches (writing back all dirty pages to disk and clearing all the caches) is not necessary for factory tests. It can reduce the latency significantly. The scale is about 27s -> 3s, for running 2 empty tests.
Review URL: http://codereview.chromium.org/1780011
Add feature to mod_image_for_test to patch rootfs.
Change initctl path to get network but no chrome.
./image_to_usb.sh --install_mfg --install_autotest --test_image
which calls ./mod_image_for_test.sh --manuf
Review URL: http://codereview.chromium.org/1542011