cros-sommelier: Set Xft.dpi.

This makes sommelierrc forward the X server DPI value to the
Xft.dpi resource. This allows more applications to detect HiDPI.

Also add x11-utils and x11-xserver-utils to recommended packages
for cros-sommelier. These packages provide the utilities that
sommelierrc tries to use.

BUG=chromium:839815
TEST=google-chrome uses HiDPI by default

Change-Id: I9da4936b6dffb28bfff69164a220d5f37f562c4f
Reviewed-on: https://chromium-review.googlesource.com/1044107
Tested-by: David Reveman <reveman@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
2 files changed