Revert of Disable flaky MetricsServiceBrowserTest#CloseRenderersNormally.

chrome/browser/metrics/metrics_service_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Tests the MetricsService stat recording to make sure that the numbers are
 // what we expect.
 
 #include "components/metrics/metrics_service.h"
 
 #include <string>
@@ skipping 42 matching lines @@
 
     base::FilePath page2_path = test_directory.AppendASCII("iframe.html");
     ui_test_utils::NavigateToURLWithDisposition(
         browser(),
         net::FilePathToFileURL(page2_path),
         NEW_FOREGROUND_TAB,
         kBrowserTestFlags);
   }
 };
 
-// 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.
   const PrefService* prefs = g_browser_process->local_state();
   EXPECT_EQ(1, prefs->GetInteger(metrics::prefs::kStabilityLaunchCount));
   EXPECT_EQ(3, prefs->GetInteger(metrics::prefs::kStabilityPageLoadCount));
   EXPECT_EQ(0, prefs->GetInteger(metrics::prefs::kStabilityRendererCrashCount));
   // TODO(isherman): We should also verify that
   // metrics::prefs::kStabilityExitedCleanly
   // is set to true, but this preference isn't set until the browser
@@ skipping 32 matching lines @@
 
   // Verify that the expected stability metrics were recorded.
   EXPECT_EQ(1, prefs->GetInteger(metrics::prefs::kStabilityLaunchCount));
   EXPECT_EQ(4, prefs->GetInteger(metrics::prefs::kStabilityPageLoadCount));
   EXPECT_EQ(1, prefs->GetInteger(metrics::prefs::kStabilityRendererCrashCount));
   // TODO(isherman): We should also verify that
   // metrics::prefs::kStabilityExitedCleanly
   // is set to true, but this preference isn't set until the browser
   // exits... it's not clear to me how to test that.
 }