crosperf: clean lint warnings.

BUG=chromium:567921
TEST=it is lint clean now.

Change-Id: I4197ff8b16bc70edfd8570e5a619c6486a7c6d2e
Reviewed-on: https://chrome-internal-review.googlesource.com/242711
Commit-Ready: Yunlian Jiang <yunlian@google.com>
Tested-by: Yunlian Jiang <yunlian@google.com>
Reviewed-by: Han Shen <shenhan@google.com>
1 file changed