Disable ExistingUserControllerTest.ExistingUserLogin, which is flaky.

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 223 matching lines @@
       AccountId::FromUserEmailGaiaId(kUsername, kGaiaID);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ExistingUserControllerTest);
 };
 
 IN_PROC_BROWSER_TEST_F(ExistingUserControllerTest, PRE_ExistingUserLogin) {
   RegisterUser(account_id_.GetUserEmail());
 }
 
-IN_PROC_BROWSER_TEST_F(ExistingUserControllerTest, ExistingUserLogin) {
+IN_PROC_BROWSER_TEST_F(ExistingUserControllerTest, DISABLED_ExistingUserLogin) {
   EXPECT_CALL(*mock_login_display_, SetUIEnabled(false))
       .Times(2);
   UserContext user_context(account_id_);
   user_context.SetKey(Key(kPassword));
   user_context.SetUserIDHash(account_id_.GetUserEmail());
   test::UserSessionManagerTestApi session_manager_test_api(
       UserSessionManager::GetInstance());
   session_manager_test_api.InjectStubUserContext(user_context);
   EXPECT_CALL(*mock_login_display_, SetUIEnabled(true))
       .Times(1);
@@ skipping 499 matching lines @@
                        PRE_TestLoadingPublicUsersFromLocalState) {
   // First run propagates public accounts and stores them in Local State.
 }
 
 IN_PROC_BROWSER_TEST_F(ExistingUserControllerPublicSessionTest,
                        TestLoadingPublicUsersFromLocalState) {
   // Second run loads list of public accounts from Local State.
 }
 
 }  // namespace chromeos