Revert of Disable BackgroundRendererProcesses in absence of Finch. (patchset #1 id:1 of https://codereview.chromium.org/
1076033002/)
Reason for revert:
Bring BackgroundRendererProcesses back on trunk -- will give us perf waterfall coverage now (session_restore tests were borked when this landed so we didn't get the backward effect and are still in the dark here)...
Original issue's description:
> Disable BackgroundRendererProcesses experiment in absence of Finch.
>
> (temporarily in order to get perf waterfall coverage for new session restore tests)
>
> BUG=459600
>
> Committed: https://crrev.com/
78011fcdf7c4e17949429bb99fbe6a68ca822b44
> Cr-Commit-Position: refs/heads/master@{#324521}
TBR=avi@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=459600
Review URL: https://codereview.chromium.org/
1083673002
Cr-Commit-Position: refs/heads/master@{#324838}