autotest/factory_PreFinalCheck: add verified boot key matching test (from ToT to factory branch)
This is cherry-picked from: http://codereview.chromium.org/6677018
Using dev_debug_vboot to verify all the keys are correct.
NOTE: verifying needs to read from system flashrom, and that takes
10-20 seconds on Alex for each trial (pressing space).
Before this CL, PreFinalCheck takes 1-2 seconds for each run;
by applying this CL, each run needs 10+ seconds.
BUG=chrome-os-partner:2634
TEST=on alex with OS in partition B signed with ssd key -> pass
OS in B signed with recovery key -> fail
Review URL: http://codereview.chromium.org/6673039
Change-Id: Ib16eb911993d1ee4e40c3bc5ade28fb4dcf778c8
1 file changed
