Disable ActiveDirectoryLoginAutocompleteTest.LoginSuccess under MSAN

This test is flaky under MSAN.

Tbr: alemate@chromium.org
Bug: 1031545
Change-Id: Ie22aff087919b8f7c4f74d06710b500734d6766a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2095405Reviewed-by: Kevin McNee <mcnee@chromium.org>
Commit-Queue: Kevin McNee <mcnee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748340}

chrome/browser/chromeos/login/active_directory_login_browsertest.cc

@@ -268,7 +268,14 @@ IN_PROC_BROWSER_TEST_F(ActiveDirectoryWebUILoginTest,
 }
 
 // Tests that autocomplete works. Submits username without domain.
-IN_PROC_BROWSER_TEST_F(ActiveDirectoryLoginAutocompleteTest, LoginSuccess) {
+// TODO(1031545): Flaky under MSAN.
+#if defined(MEMORY_SANITIZER)
+#define MAYBE_LoginSuccess DISABLED_LoginSuccess
+#else
+#define MAYBE_LoginSuccess LoginSuccess
+#endif
+IN_PROC_BROWSER_TEST_F(ActiveDirectoryLoginAutocompleteTest,
+                       MAYBE_LoginSuccess) {
   OobeBaseTest::WaitForSigninScreen();
   ASSERT_TRUE(InstallAttributes::Get()->IsActiveDirectoryManaged());
   ad_login_.TestNoError();