Revert of [tools/perf] Disable browse:social:twitter on mac (patchset #1 id:1 of https://codereview.chromium.org/2886463002/ )

Reason for revert:
Breaking change got reverted at:
https://chromium-review.googlesource.com/c/505649/

Original issue's description:
> [tools/perf] Disable browse:social:twitter on mac
>
> Benchmark is failing on Mac bots.
>
> TBR=nednguyen@google.com
> BUG=722094
>
> Review-Url: https://codereview.chromium.org/2886463002
> Cr-Commit-Position: refs/heads/master@{#471757}
> Committed: https://chromium.googlesource.com/chromium/src/+/5d406d88f635955f2ab90a1832cb0cd3dc86591c

TBR=nednguyen@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=722094

Review-Url: https://codereview.chromium.org/2883983003
Cr-Commit-Position: refs/heads/master@{#471782}
1 file changed