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}
diff --git a/chrome/browser/metrics/metrics_service_browsertest.cc b/chrome/browser/metrics/metrics_service_browsertest.cc
index 2ba8c021..740f6ba7 100644
--- a/chrome/browser/metrics/metrics_service_browsertest.cc
+++ b/chrome/browser/metrics/metrics_service_browsertest.cc
@@ -77,7 +77,8 @@
 // Flaky on Linux. See http://crbug.com/131094
 // Child crashes fail the process on ASan (see crbug.com/411251,
 // crbug.com/368525).
-#if defined(OS_LINUX) || defined(ADDRESS_SANITIZER)
+// Flaky failing DCHECK on Windows, see crbug.com/635770
+#if defined(OS_LINUX) || defined(ADDRESS_SANITIZER) || defined(OS_WIN)
 #define MAYBE_CrashRenderers DISABLED_CrashRenderers
 #else
 #define MAYBE_CrashRenderers CrashRenderers
@@ -112,4 +113,3 @@
   // is set to true, but this preference isn't set until the browser
   // exits... it's not clear to me how to test that.
 }
-