crosperf: fix lint warnings.

BUG=none
TEST=unittest passes.

Change-Id: I1fb0c8c3fbf31fb4a26b7e02c34207f16541e0b5
Reviewed-on: https://chrome-internal-review.googlesource.com/243086
Commit-Ready: Yunlian Jiang <yunlian@google.com>
Tested-by: Yunlian Jiang <yunlian@google.com>
Reviewed-by: Yunlian Jiang <yunlian@google.com>
1 file changed