Refactor the windows policy provider to use AsynchronousPolicyProvider.

chrome/browser/policy/configuration_policy_provider_delegate_win.h

+// 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.
+
+#ifndef CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PROVIDER_DELEGATE_WIN_H_
+#define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PROVIDER_DELEGATE_WIN_H_
+#pragma once
+
+#include "chrome/browser/policy/asynchronous_policy_provider.h"
+
+namespace policy {
+
+class ConfigurationPolicyProviderDelegateWin
+    : public AsynchronousPolicyProvider::Delegate {
+ public:
+  ConfigurationPolicyProviderDelegateWin(
+      const ConfigurationPolicyProvider::PolicyDefinitionList*
+          policy_definition_list);
+  virtual ~ConfigurationPolicyProviderDelegateWin() {}
+
+  // AsynchronousPolicyProvider::Delegate overrides:
+  virtual DictionaryValue* Load();
+
+ private:
+  // Methods to perform type-specific policy lookups in the registry.
+  // HKLM is checked first, then HKCU.
+
+  // Reads a string registry value |name| at the specified |key| and puts the
+  // resulting string in |result|.
+  bool GetRegistryPolicyString(const string16& name, string16* result) const;
+  // Gets a list value contained under |key| one level below the policy root.
+  bool GetRegistryPolicyStringList(const string16& key,
+                                   ListValue* result) const;
+  bool GetRegistryPolicyBoolean(const string16& value_name,
+                                bool* result) const;
+  bool GetRegistryPolicyInteger(const string16& value_name,
+                                uint32* result) const;
+
+  const ConfigurationPolicyProvider::PolicyDefinitionList*
+      policy_definition_list_;
+
+  DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyProviderDelegateWin);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PROVIDER_DELEGATE_WIN_H_