*actually* install, rather than just echo the command line to install
*actually* install, rather than just echo the command line to install

I mocked out the install calls with "echo" to test my previous checkin, and forgot to remove them before
pushing the change.

BUG=chromium-os:4143
TEST=run on desktop machine and ensure that "/usr/sbin/chromeos-install: No such file or directory"

Review URL: http://codereview.chromium.org/2851010

joshfire/chromiumos-platform-window_manager,joshfire/chromiumos-platform-window_manager,joshfire/chromiumos-platform-window_manager,joshfire/chromiumos-platform-window_manager