Add Speedometer 2.0 benchmark

To run this:
./tools/perf/run_benchmark speedometer2 --also-run-disabled-tests

Actually enable this benchmark on perf waterfall is tracked in crbug.com/734061

BUG: 708103
Change-Id: I00082517c5fffcef660eee61eb192788e5dae6a4
Reviewed-on: https://chromium-review.googlesource.com/509012
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#482988}
1 file changed