Implement new-style CloudPolicyStore for Chrome OS device policy.

chrome/browser/policy/device_cloud_policy_store_chromeos.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_DEVICE_CLOUD_POLICY_STORE_CHROMEOS_H_
+#define CHROME_BROWSER_POLICY_DEVICE_CLOUD_POLICY_STORE_CHROMEOS_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/chromeos/settings/device_settings_service.h"
+#include "chrome/browser/policy/cloud_policy_store.h"
+#include "chrome/browser/policy/cloud_policy_validator.h"
+
+namespace enterprise_management {
+class PolicyFetchResponse;
+}
+
+namespace policy {
+
+class EnterpriseInstallAttributes;
+
+// CloudPolicyStore implementation for device policy on Chrome OS. Policy is
+// stored/loaded via DBus to/from session_manager.
+class DeviceCloudPolicyStoreChromeOS
+    : public CloudPolicyStore,
+      public chromeos::DeviceSettingsService::Observer {
+ public:
+  DeviceCloudPolicyStoreChromeOS(
+      chromeos::DeviceSettingsService* device_settings_service,
+      EnterpriseInstallAttributes* install_attributes);
+  virtual ~DeviceCloudPolicyStoreChromeOS();
+
+  // CloudPolicyStore:
+  virtual void Store(
+      const enterprise_management::PolicyFetchResponse& policy) OVERRIDE;
+  virtual void Load() OVERRIDE;
+  virtual void RemoveStoredPolicy() OVERRIDE;
+
+  // Installs initial policy. This is different from Store() in that it skips
+  // the signature validation step against already-installed policy. The checks
+  // against installation-time attributes are performed nevertheless. The result
+  // of the operation is reported through the OnStoreLoaded() or OnStoreError()
+  // observer callbacks.
+  void InstallInitialPolicy(
+      const enterprise_management::PolicyFetchResponse& policy);
+
+  // chromeos::DeviceSettingsService::Observer:
+  virtual void OwnershipStatusChanged() OVERRIDE;
+  virtual void DeviceSettingsUpdated() OVERRIDE;
+
+ private:
+  // Create a validator for |policy| with basic device policy configuration and
+  // OnPolicyStored() as the completion callback.
+  scoped_ptr<DeviceCloudPolicyValidator> CreateValidator(
+      const enterprise_management::PolicyFetchResponse& policy);
+
+  // Called on completion on the policy validation prior to storing policy.
+  // Starts the actual store operation.
+  void OnPolicyToStoreValidated(DeviceCloudPolicyValidator* validator);
+
+  // Handles store completion operations updates status.
+  void OnPolicyStored();
+
+  // Re-syncs policy and status from |device_settings_service_|.
+  void UpdateFromService();
+
+  chromeos::DeviceSettingsService* device_settings_service_;
+  EnterpriseInstallAttributes* install_attributes_;
+
+  base::WeakPtrFactory<DeviceCloudPolicyStoreChromeOS> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeviceCloudPolicyStoreChromeOS);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_POLICY_DEVICE_CLOUD_POLICY_STORE_CHROMEOS_H_