cros: Use runtime stylus detection for ash palette.

cros: Use runtime stylus detection for ash palette.

The same cros image can be used on devices both with and without stylus support. This means we have to use runtime detection for enabling the palette, as we cannot differentiate in the overlay as we do now (USE="stylus").

BUG=679451
Review-Url: https://codereview.chromium.org/2644713002

(cherry picked from commit d08c50b08dfba28fea35212d604fa4619b663724)

Review-Url: https://codereview.chromium.org/2686383002 .
Cr-Commit-Position: refs/branch-heads/2987@{#457}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/8f066a29781bcb35038eeae2a871ecd5222a0dd0

[jdufault, 2017-02-11 00:16:45]

Description was changed from

==========
cros: Use runtime stylus detection for ash palette.

The same cros image can be used on devices both with and without stylus support.
This means we have to use runtime detection for enabling the palette, as we
cannot differentiate in the overlay as we do now (USE="stylus").

BUG=679451

Review-Url: https://codereview.chromium.org/2644713002

(cherry picked from commit d08c50b08dfba28fea35212d604fa4619b663724)
==========

to

==========
cros: Use runtime stylus detection for ash palette.

The same cros image can be used on devices both with and without stylus support.
This means we have to use runtime detection for enabling the palette, as we
cannot differentiate in the overlay as we do now (USE="stylus").

BUG=679451

Review-Url: https://codereview.chromium.org/2644713002

(cherry picked from commit d08c50b08dfba28fea35212d604fa4619b663724)

Review-Url: https://codereview.chromium.org/2686383002 .
Cr-Commit-Position: refs/branch-heads/2987@{#457}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/8f066a29781bcb35038eeae2a871...
==========

[jdufault, 2017-02-11 00:16:46]

Committed patchset #1 (id:1) manually as
8f066a29781bcb35038eeae2a871ecd5222a0dd0.