Disable MetricsServiceBrowserTest.CrashRenderers on Windows

The final DCHECK in MetricsStateManager::LoadClientInfoAndMaybeMigrate
is failing flakily.

BUG=635770
TBR=asvitkine@chromium.org

Review URL: https://codereview.chromium.org/2223353003 .

Cr-Commit-Position: refs/heads/master@{#410613}
1 file changed