Add public accounts to UserManager

chrome/browser/chromeos/login/user_manager_unittest.cc

Index: chrome/browser/chromeos/login/user_manager_unittest.cc
diff --git a/chrome/browser/chromeos/login/user_manager_unittest.cc b/chrome/browser/chromeos/login/user_manager_unittest.cc
index 8d8f5e01718252fd48f0ce187121ea3d12f314ff..7c92d6bf65a9d5b36a70d833307e5237f280fabb 100644
--- a/chrome/browser/chromeos/login/user_manager_unittest.cc
+++ b/chrome/browser/chromeos/login/user_manager_unittest.cc
@@ -17,6 +17,7 @@
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/chromeos/settings/cros_settings_names.h"
 #include "chrome/browser/chromeos/settings/cros_settings_provider.h"
+#include "chrome/browser/chromeos/settings/device_settings_service.h"
 #include "chrome/browser/chromeos/settings/stub_cros_settings_provider.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/test/base/testing_browser_process.h"
@@ -80,6 +81,9 @@ class UserManagerTest : public testing::Test {
     cros_settings_->AddSettingsProvider(device_settings_provider_);
 
     UserManager::Set(old_user_manager_);
+
+    // Shut down the DeviceSettingsService.
+    DeviceSettingsService::Get()->Shutdown();
   }
 
   bool GetUserManagerEphemeralUsersEnabled() const {