[Testing] Disabling leaky test ExistingUserControllerUntrustedTest.SupervisedUserCreationForbidden

chrome/browser/chromeos/login/existing_user_controller_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 <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
@@ skipping 418 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(ExistingUserControllerUntrustedTest,
                        SupervisedUserLoginForbidden) {
   UserContext user_context(kSupervisedUserID);
   user_context.SetKey(Key(kPassword));
   user_context.SetUserIDHash(kUsername);
   existing_user_controller()->Login(user_context, SigninSpecifics());
 }
 
 IN_PROC_BROWSER_TEST_F(ExistingUserControllerUntrustedTest,
-                       SupervisedUserCreationForbidden) {
+                       DISABLED_SupervisedUserCreationForbidden) {
   MockBaseScreenDelegate mock_base_screen_delegate;
   SupervisedUserCreationScreenHandler supervised_user_creation_screen_handler;
   SupervisedUserCreationScreen supervised_user_creation_screen(
       &mock_base_screen_delegate,
       &supervised_user_creation_screen_handler);
 
   EXPECT_CALL(*mock_user_manager_, SetUserFlow(kUsername, _)).Times(1);
   supervised_user_creation_screen.AuthenticateManager(kUsername, kPassword);
 }
 
@@ skipping 378 matching lines @@
   // First run propagates public accounts and stores them in Local State.
 }
 
 // See http://crbug.com/393704; flaky.
 IN_PROC_BROWSER_TEST_F(ExistingUserControllerPublicSessionTest,
                        DISABLED_TestLoadingPublicUsersFromLocalState) {
   // Second run loads list of public accounts from Local State.
 }
 
 }  // namespace chromeos