crosperf: clean lint warnings.

BUG=chromium:567921
TEST=these three files are lint clean.

Change-Id: I99c2f46263d12b8d84c933f52393e4207e9cd0dd
Reviewed-on: https://chrome-internal-review.googlesource.com/241458
Commit-Ready: Yunlian Jiang <yunlian@google.com>
Tested-by: Yunlian Jiang <yunlian@google.com>
Reviewed-by: Caroline Tice <cmtice@google.com>
3 files changed