autotest: Tolerate missing netperf output
If we don't get everything we expect, we should just return None rather
than failing later trying to index something which isn't there.
TEST=This happened once in an attenuated performance test.
BUG=chromium:297998
Change-Id: I8770e9db8566a332e4ec33c793ae2a047b401161
Reviewed-on: https://chromium-review.googlesource.com/170554
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Paul Stewart <pstew@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
1 file changed