Use new grub2 variables to boot from the device with the bootloader

Use new grub2 variables to boot from the device with the bootloader

See http://codereview.chromium.org/2113004/show for details.

This also adds a script to allow manual selection of the preferred image (A or B).

BUG=none

[adlr, 2010-05-14 21:18:44]

http://codereview.chromium.org/2090006/diff/1/2
File src/platform/installer/chromeos-setimage (right):

http://codereview.chromium.org/2090006/diff/1/2#newcode41
src/platform/installer/chromeos-setimage:41: # Unless you pass --run_as_root,
you can't be root when you start this,
can you hoist this and the copy in installer into chromeos-common?

http://codereview.chromium.org/2090006/diff/1/2#newcode67
src/platform/installer/chromeos-setimage:67: sed -e "s/^set default=.*/set
default=$newimg/" ${mountpoint}/efi/boot/grub.cfg > ${tempfile}
80 cols

[Bill Richardson, 2010-05-14 23:54:28]

http://codereview.chromium.org/2090006/diff/1/2
File src/platform/installer/chromeos-setimage (right):

http://codereview.chromium.org/2090006/diff/1/2#newcode41
src/platform/installer/chromeos-setimage:41: # Unless you pass --run_as_root,
you can't be root when you start this,
On 2010/05/14 21:18:44, adlr wrote:
> can you hoist this and the copy in installer into chromeos-common?

Okay

[adlr, 2010-05-14 23:58:12]

LGTM