cgpt: fix lint warnings

BUG=chromium:431514
TEST=no more lint warnings
TEST=pre-cq passes

Change-Id: If87403d6bc4e66a789359b57444abc303831d8ad
Reviewed-on: https://chromium-review.googlesource.com/231220
Reviewed-by: Daniel Ehrenberg <dehrenberg@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Nam Nguyen <namnguyen@chromium.org>
1 file changed