Disable flaky MD Settings tests on Windows

chrome/browser/ui/webui/settings/md_settings_ui_browsertest.cc

Index: chrome/browser/ui/webui/settings/md_settings_ui_browsertest.cc
diff --git a/chrome/browser/ui/webui/settings/md_settings_ui_browsertest.cc b/chrome/browser/ui/webui/settings/md_settings_ui_browsertest.cc
index 8ab348ea5ec0b00b7b90b3ef3bc01f92241a6152..8614ed948a06b1cc645357b95e026b62cbe06380 100644
--- a/chrome/browser/ui/webui/settings/md_settings_ui_browsertest.cc
+++ b/chrome/browser/ui/webui/settings/md_settings_ui_browsertest.cc
@@ -29,9 +29,10 @@ IN_PROC_BROWSER_TEST_F(MdSettingsUITest, ViewSourceDoesntCrash) {
            chrome::kChromeUIMdSettingsURL));
 }
 
-// May not complete on memory bots. TODO(dbeam): investigate and fix.
-// See https://crbug.com/558434 and https://crbug.com/620370.
-#if defined(MEMORY_SANITIZER)
+// May not complete on memory and Windows debug bots. TODO(dbeam): investigate
+// and fix. See https://crbug.com/558434, https://crbug.com/620370 and
+// https://crbug.com/651296.
+#if defined(MEMORY_SANITIZER) || defined(OS_WIN)
 #define MAYBE_BackForwardDoesntCrash DISABLED_BackForwardDoesntCrash
 #else
 #define MAYBE_BackForwardDoesntCrash BackForwardDoesntCrash