Revert of Disable MetricsServiceBrowserTest.CrashRenderers on Windows (patchset #1 id:1 of https://codereview.chromium.org/2223353003/ )

Reason for revert:
Re-enabling test given the underlying issue has
been fixed.

Original issue's description:
> Disable MetricsServiceBrowserTest.CrashRenderers on Windows
>
> The final DCHECK in MetricsStateManager::LoadClientInfoAndMaybeMigrate
> is failing flakily.
>
> BUG=635770
> TBR=asvitkine@chromium.org
>
> Committed: https://crrev.com/a5445ce1c75599a59781e686303627dfa468e47a
> Cr-Commit-Position: refs/heads/master@{#410613}

TBR=foolip@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=635770

Review-Url: https://codereview.chromium.org/2245483006
Cr-Commit-Position: refs/heads/master@{#411836}
1 file changed