We need this benchmark to measure speedup of getPossibleBreakpoints method by [1].

[1] https://chromium-review.googlesource.com/c/591027/

R=dgozman@chromium.org

Bug: none
Change-Id: I617a435d5a162800caae2fb85596839a57d4d9bd
Reviewed-on: https://chromium-review.googlesource.com/592308Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46992}