Delete old user manager in ~ScopedTestCrosSettings

chrome/browser/chromeos/settings/cros_settings.cc

Index: chrome/browser/chromeos/settings/cros_settings.cc
diff --git a/chrome/browser/chromeos/settings/cros_settings.cc b/chrome/browser/chromeos/settings/cros_settings.cc
index 2e7e3565e774809510b39491c84fa70b97358c41..10c7ddf74052ea04739bddbd6f4e11c8053062b3 100644
--- a/chrome/browser/chromeos/settings/cros_settings.cc
+++ b/chrome/browser/chromeos/settings/cros_settings.cc
@@ -340,7 +340,8 @@ ScopedTestCrosSettings::ScopedTestCrosSettings()
 
 ScopedTestCrosSettings::~ScopedTestCrosSettings() {
   // UserManager holds a CrosSettings*, so ensure that it is destroyed.
-  UserManager::Set(NULL);
+  UserManager* old_manager = UserManager::Set(NULL);
+  delete old_manager;
   CrosSettings::Shutdown();
   if (initialized_device_settings_service_)
     DeviceSettingsService::Shutdown();