Changing policy while Chrome is running should refresh preferences without relaunching

chrome/browser/configuration_policy_provider_win_unittest.cc

 // Copyright (c) 2010 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 <gtest/gtest.h>
 
 #include <windows.h>
 
 #include "base/logging.h"
 #include "base/registry.h"
@@ skipping 95 matching lines @@
   void DeactivateOverrides();
 
   // Deletes the registry key created during the tests.
   void DeleteRegistrySandbox();
 
   void TestBooleanPolicyDefault(ConfigurationPolicyStore::PolicyType type);
   void TestBooleanPolicyHKLM(ConfigurationPolicyStore::PolicyType type);
   void TestBooleanPolicy(ConfigurationPolicyStore::PolicyType type);
 
  private:
+  // A message loop must be declared and instantiated for these tests,
+  // because Windows policy provider create WaitableEvents and
+  // ObjectWatchers that require the tests to have a MessageLoop associated
+  // with the thread executing the tests.
+  MessageLoop loop_;
+
   // Keys are created for the lifetime of a test to contain
   // the sandboxed HKCU and HKLM hives, respectively.
   RegKey temp_hkcu_hive_key_;
   RegKey temp_hklm_hive_key_;
 };
 
 ConfigurationPolicyProviderWinTest::ConfigurationPolicyProviderWinTest()
     : temp_hklm_hive_key_(HKEY_CURRENT_USER, kUnitTestMachineOverrideSubKey),
       temp_hkcu_hive_key_(HKEY_CURRENT_USER, kUnitTestUserOverrideSubKey) {
 }
@@ skipping 175 matching lines @@
 
 TEST_F(ConfigurationPolicyProviderWinTest,
     TestPolicyMetricsReportingEnabled) {
   TestBooleanPolicy(ConfigurationPolicyStore::kPolicyMetricsReportingEnabled);
 }
 
 TEST_F(ConfigurationPolicyProviderWinTest,
     TestPolicyPasswordManagerEnabled) {
   TestBooleanPolicy(ConfigurationPolicyStore::kPolicyPasswordManagerEnabled);
 }