crosperf: clean lint warning.

BUG=chromium:567921
TEST=experiment_status.py is lint clean.

Change-Id: I58553bfe9990b6b8e93e3aeee3daf7e634a96ac8
Reviewed-on: https://chrome-internal-review.googlesource.com/241570
Commit-Ready: Yunlian Jiang <yunlian@google.com>
Tested-by: Yunlian Jiang <yunlian@google.com>
Reviewed-by: Caroline Tice <cmtice@google.com>
1 file changed