Marking MetricsServiceTest.CloseRenderersNormally flaky on Mac

BUG=92635
TBR=georgey@chromium.org
Review URL: http://codereview.chromium.org/7640015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96545 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/metrics/metrics_service_uitest.cc

@@ -66,7 +66,14 @@ class MetricsServiceTest : public UITest {
 #endif
 };
 
-TEST_F(MetricsServiceTest, CloseRenderersNormally) {
+#if defined(OS_MACOSX)
+// Flaky across all Mac bots: http://crbug.com/92635
+#define MAYBE_CloseRenderersNormally FLAKY_CloseRenderersNormally
+#else
+#define MAYBE_CloseRenderersNormally CloseRenderersNormally
+#endif
+
+TEST_F(MetricsServiceTest, MAYBE_CloseRenderersNormally) {
   OpenTabs();
   QuitBrowser();