Disable GaiaAuthOffline test under MSan.

chrome/browser/chromeos/login/login_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.
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "base/command_line.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
@@ skipping 316 matching lines @@
   TestSystemTrayIsVisible();
 }
 
 IN_PROC_BROWSER_TEST_F(LoginTest, PRE_GaiaAuthOffline) {
   RegisterUser(kTestUser);
   chromeos::StartupUtils::MarkOobeCompleted();
   chromeos::CrosSettings::Get()->SetBoolean(
       chromeos::kAccountsPrefShowUserNamesOnSignIn, false);
 }
 
-IN_PROC_BROWSER_TEST_F(LoginTest, GaiaAuthOffline) {
+#if defined(MEMORY_SANITIZER)
+#define MAYBE_GaiaAuthOffline DISABLED_GaiaAuthOffline
+#else
+#define MAYBE_GaiaAuthOffline GaiaAuthOffline
+#endif
+IN_PROC_BROWSER_TEST_F(LoginTest, MAYBE_GaiaAuthOffline) {
   PrepareOfflineLogin();
   content::WindowedNotificationObserver session_start_waiter(
       chrome::NOTIFICATION_SESSION_STARTED,
       content::NotificationService::AllSources());
   SubmitGaiaAuthOfflineForm(kTestUser, kPassword);
   session_start_waiter.Wait();
 
   TestSystemTrayIsVisible();
 }
 
 }  // namespace