AU: Handle firmware update failure when booted from FW slot B.

AU: Handle firmware update failure when booted from FW slot B.

The firmware updater will fail if we are booted into FW slot B and we
try to update firmware. We shouldn't treat this like a usual update
failure because trying again won't help until we reboot. Thus, with
this CL, we detect this case and request a reboot from the
user. Technically this request is a lie, b/c we are reusing the reboot
request mechanism which tells the user an update has been applied and
thus must be rebooted. We accept this fib since this situation is very
rare: use would have to have 2 FW update updates in a row w/o any
extra boots between.

Also, fix error code in subprocess.

Also, remove execute permissions on a bunch of source files.

BUG=chromium-os:14343
TEST=unittests, tested updates on machine that success, fail, have FW B failure

Committed: http://chrome-svn/viewvc/chromeos?view=rev&revision=c1d5c93

[adlr, 2011-04-20 20:07:57]

it's not as bad as it looks. Most files' changes are just removing exec perms
from the file.

[thieule, 2011-04-21 00:13:51]

LGTM

On 2011/04/20 20:07:57, adlr wrote:
> it's not as bad as it looks. Most files' changes are just removing exec perms
> from the file.