Check for lid state being "closed" instead of not "open".

This fixes issue seen on Dell Vostro where the lid state was being
reported as "unsupported" on some occasions.

BUG: http://crosbug.com/2676
TEST: Tested on Dell Vostro and Asus EEEPC

Review URL: http://codereview.chromium.org/1753012
1 file changed