CHERRY-PICK: [keyboard] output debug info in console.

BUG=None
TEST=manual

Original-Change-Id: Ib61af85982b3f91dc3092aa2a1d2bc76fd09f042
Reviewed-on: https://chromium-review.googlesource.com/233131
Commit-Queue: Dean Liao <deanliao@chromium.org>
Tested-by: Dean Liao <deanliao@chromium.org>
Reviewed-by: Ricky Liang <jcliang@chromium.org>
Change-Id: I09469fe6a7cc93489eafeb8ac83ed44e9aea3245
Reviewed-on: https://chromium-review.googlesource.com/235706
1 file changed