crosperf: fix telemetry results parsing.
New telemetry results provide multiple values for a single key.
This CL uses the average value to make crosperf work.
BUG=chromium:639896
TEST=run crosperf with 2 iterations of speedometer.
Change-Id: I32e7a00a57dbbe995915af0c32918f1d680ae484
Reviewed-on: https://chrome-internal-review.googlesource.com/279057
Commit-Ready: Yunlian Jiang <yunlian@google.com>
Tested-by: Yunlian Jiang <yunlian@google.com>
Reviewed-by: Caroline Tice <cmtice@google.com>
2 files changed
