Revert of Disable flaky MetricsServiceBrowserTest#CloseRenderersNormally.

chrome/browser/metrics/metrics_service_browsertest.cc

Index: chrome/browser/metrics/metrics_service_browsertest.cc
diff --git a/chrome/browser/metrics/metrics_service_browsertest.cc b/chrome/browser/metrics/metrics_service_browsertest.cc
index 9f329da363e37c1aaf116ca18321c97fe05c6f51..740f6ba76c1ec7b5b34b1190f66d85e4d7073bbf 100644
--- a/chrome/browser/metrics/metrics_service_browsertest.cc
+++ b/chrome/browser/metrics/metrics_service_browsertest.cc
@@ -60,14 +60,7 @@
   }
 };
 
-// Flaky failing DCHECK on Windows, see crbug.com/636052
-#if defined(OS_WIN)
-#define MAYBE_CloseRenderersNormally DISABLED_CloseRenderersNormally
-#else
-#define MAYBE_CloseRenderersNormally CloseRenderersNormally
-#endif
-IN_PROC_BROWSER_TEST_F(MetricsServiceBrowserTest,
-    MAYBE_CloseRenderersNormally) {
+IN_PROC_BROWSER_TEST_F(MetricsServiceBrowserTest, CloseRenderersNormally) {
   OpenTabs();
 
   // Verify that the expected stability metrics were recorded.