Implement the ConfigDirPolicyProvider based on the AsyncPolicyLoader

chrome/browser/policy/config_dir_policy_provider.h

 // 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.
 
 #ifndef CHROME_BROWSER_POLICY_CONFIG_DIR_POLICY_PROVIDER_H_
 #define CHROME_BROWSER_POLICY_CONFIG_DIR_POLICY_PROVIDER_H_
 #pragma once
 
 #include "base/time.h"
 #include "chrome/browser/policy/file_based_policy_provider.h"
 
 class FilePath;
 
 namespace base {
 class Value;
 }
 
 namespace policy {
 
 class PolicyBundle;
 
 // Policy provider backed by JSON files in a configuration directory.
 class ConfigDirPolicyProvider : public FileBasedPolicyProvider {
  public:
   ConfigDirPolicyProvider(const PolicyDefinitionList* policy_list,
-                          PolicyLevel level,
                           PolicyScope scope,
                           const FilePath& config_dir);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ConfigDirPolicyProvider);
 };
 
 // A provider delegate implementation backed by a set of files in a given
 // directory. The files should contain JSON-formatted policy settings. They are
 // merged together and the result is returned via the ProviderDelegate
 // interface. The files are consulted in lexicographic file name order, so the
 // last value read takes precedence in case of preference key collisions.
 class ConfigDirPolicyProviderDelegate
     : public FileBasedPolicyProvider::ProviderDelegate {
  public:
   ConfigDirPolicyProviderDelegate(const FilePath& config_dir,
-                                  PolicyLevel level,
                                   PolicyScope scope);
 
   // FileBasedPolicyProvider::ProviderDelegate implementation.
   virtual scoped_ptr<PolicyBundle> Load() OVERRIDE;
   virtual base::Time GetLastModification() OVERRIDE;
 
  private:
-  // Merges the 3rd party |policies| into the |bundle|.
-  void Merge3rdPartyPolicy(PolicyBundle* bundle,
-                           const base::Value* policies);
+  // Loads the policy files at |path| into the |bundle|, with the given |level|.
+  void LoadFromPath(const FilePath& path,
+                    PolicyLevel level,
+                    PolicyBundle* bundle);
 
-  // Policies loaded by this provider will have these attributes.
-  PolicyLevel level_;
+  // Merges the 3rd party |policies| into the |bundle|, with the given |level|.
+  void Merge3rdPartyPolicy(const base::Value* policies,
+                           PolicyLevel level,
+                           PolicyBundle* bundle);
+
+  // Policies loaded by this provider will have this scope.
   PolicyScope scope_;
 
   DISALLOW_COPY_AND_ASSIGN(ConfigDirPolicyProviderDelegate);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CONFIG_DIR_POLICY_PROVIDER_H_