[Sheriff] Disable LoginUtilsTest.MashLogin

Bug: 957584
Change-Id: I6b102ebff3ba6b36032e93cf43d82c39ad4e6710
Tbr: tbarzic@chromium.org, xiyuan@chromium.org
No-Try: True
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1588198Reviewed-by: Adithya Srinivasan <adithyas@chromium.org>
Commit-Queue: Adithya Srinivasan <adithyas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654864}

chrome/browser/chromeos/login/login_utils_browsertest.cc

@@ -84,7 +84,13 @@ class LoginUtilsTest : public OobeBaseTest {
 };
 
 // Exercises login, like the desktopui_MashLogin Chrome OS autotest.
-IN_PROC_BROWSER_TEST_F(LoginUtilsTest, MashLogin) {
+// Test is flaky, see https://crbug.com/957584.
+#if defined(MEMORY_SANITIZER)
+#define MAYBE_MashLogin DISABLED_MashLogin
+#else
+#define MAYBE_MashLogin MashLogin
+#endif
+IN_PROC_BROWSER_TEST_F(LoginUtilsTest, MAYBE_MashLogin) {
   // Test is relevant for both SingleProcessMash and MultiProcessMash, but
   // not classic ash.
   if (!features::IsUsingWindowService())