[ECHO] Cache coupon code values read from the VPD

This CL adds support for caching coupon code values read from the OOBE.
This values need to be accessible to Chrome whenever an ECHO offers transcation
is initated.

BUG=chromium-os:27865
TEST=manually ran, also verified that the cache file is generated by
     forcing an OOBE.

Change-Id: I08b0bf806304fe6451c940015954975d04ddd74e
Reviewed-on: https://gerrit.chromium.org/gerrit/18921
Commit-Ready: Gaurav Shah <gauravsh@chromium.org>
Tested-by: Gaurav Shah <gauravsh@chromium.org>
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
1 file changed
tree: ad298df105c2499082aeca1140f9b9f94a9db964
  1. include/
  2. lib/
  3. util/
  4. LICENSE
  5. Makefile
  6. README
  7. vpd.c