Rolling v8/third_party/google_benchmark/src: https://chromium.googlesource.com/external/github.com/google/benchmark/+log/19026e2..e451e50

add g++ to sanitizer buildbots (#1197) (Dominic Hamon)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/e451e50

Don't return a reference when the callers all expect pointers. (Dominic Hamon)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/1fcb5c2

TBR=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com,mlippautz@chromium.org

Change-Id: I066c8d89e57fdc105b9e67c9adedc3e6de384e3f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3002698Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#75524}