GitLab

Update LED state in kernel in InputControllerEvdev::SetCapsLockEnabled.
This is currently the only way to toggle caps lock.

BUG=463242
TEST=plug in external keyboard on link_freon & press caps lock. Light on
  keyboard should turn on.

Review URL: https://codereview.chromium.org/971753006

Cr-Commit-Position: refs/heads/master@{#318934}