Add ManagedModePolicyProvider and extension API to get and set policies.

chrome/browser/policy/managed_mode_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_MANAGED_MODE_POLICY_PROVIDER_H_
+#define CHROME_BROWSER_POLICY_MANAGED_MODE_POLICY_PROVIDER_H_
+#pragma once
+
+#include "base/memory/ref_counted.h"
+#include "chrome/browser/policy/configuration_policy_provider.h"
+#include "chrome/browser/profiles/profile_keyed_service.h"
+#include "chrome/common/persistent_pref_store.h"
+
+class Profile;
+
+namespace policy {
+

[Mattias Nissler (ping if slow), 2012/06/06 17:22:09]

Please put a comment describing what this class is good for and how it's
supposed to be used.

[Bernhard Bauer, 2012/06/08 10:06:44]

Done.

+class ManagedModePolicyProvider

[Joao da Silva, 2012/06/06 16:36:38]

Please keep the declaration order in the .h and the definition order in the .cc
the same

[Bernhard Bauer, 2012/06/08 10:06:44]

Done.

+    : public ProfileKeyedService,
+      public ConfigurationPolicyProvider,
+      public PrefStore::Observer {
+ public:
+  explicit ManagedModePolicyProvider(Profile* profile);
+  virtual ~ManagedModePolicyProvider();
+
+  // Returns the stored value for a policy with the given |key|, or NULL if no
+  // such policy is defined.
+  const base::Value* GetPolicy(const std::string& key) const;
+  // Sets the policy with the given |key| to a copy of the given |value|.
+  void SetPolicy(const std::string& key, const base::Value* value);
+
+  // ConfigurationPolicyProvider implementation:
+  virtual void RefreshPolicies() OVERRIDE;
+  virtual bool IsInitializationComplete() const OVERRIDE;
+
+  // PrefStore::Observer implementation:
+  virtual void OnPrefValueChanged(const std::string& key) OVERRIDE;
+  virtual void OnInitializationCompleted(bool success) OVERRIDE;
+
+ private:
+  base::DictionaryValue* GetPolicyDictionary() const;
+  void UpdatePolicies();
+

[Mattias Nissler (ping if slow), 2012/06/06 17:22:09]

Put a comment explaining that this is used for persisting policy and to avoid
confusion, mention that this PrefStore is not hooked up with PrefService.

[Bernhard Bauer, 2012/06/08 10:06:44]

Done.

+  scoped_refptr<PersistentPrefStore> store_;
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_POLICY_MANAGED_MODE_POLICY_PROVIDER_H_