Move policy code into components/policy.

chrome/browser/policy/cloud/component_cloud_policy_updater.h

-// Copyright (c) 2013 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_CLOUD_COMPONENT_CLOUD_POLICY_UPDATER_H_
-#define CHROME_BROWSER_POLICY_CLOUD_COMPONENT_CLOUD_POLICY_UPDATER_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/policy/cloud/external_policy_data_updater.h"
-#include "components/policy/core/common/policy_namespace.h"
-
-namespace base {
-class SequencedTaskRunner;
-}
-
-namespace enterprise_management {
-class PolicyFetchResponse;
-}
-
-namespace policy {
-
-class ComponentCloudPolicyStore;
-class ExternalPolicyDataFetcher;
-
-// This class downloads external policy data, given PolicyFetchResponses.
-// It validates the PolicyFetchResponse and its corresponding data, and caches
-// them in a ComponentCloudPolicyStore. It also enforces size limits on what's
-// cached.
-// It retries to download the policy data periodically when a download fails.
-class ComponentCloudPolicyUpdater {
- public:
-  // This class runs on the background thread represented by |task_runner|,
-  // which must support file I/O. All network I/O is delegated to the
-  // |external_policy_data_fetcher|.
-  ComponentCloudPolicyUpdater(
-      scoped_refptr<base::SequencedTaskRunner> task_runner,
-      scoped_ptr<ExternalPolicyDataFetcher> external_policy_data_fetcher,
-      ComponentCloudPolicyStore* store);
-  ~ComponentCloudPolicyUpdater();
-
-  // |response| is the latest policy information fetched for some component.
-  // This method schedules the download of the policy data, if |response| is
-  // validated. If the downloaded data also passes validation then that data
-  // will be passed to the |store_|.
-  void UpdateExternalPolicy(
-      scoped_ptr<enterprise_management::PolicyFetchResponse> response);
-
-  // Cancels any pending operations for the given namespace.
-  void CancelUpdate(const PolicyNamespace& ns);
-
- private:
-  std::string NamespaceToKey(const PolicyNamespace& ns);
-
-  ComponentCloudPolicyStore* store_;
-  ExternalPolicyDataUpdater external_policy_data_updater_;
-
-  DISALLOW_COPY_AND_ASSIGN(ComponentCloudPolicyUpdater);
-};
-
-}  // namespace policy
-
-#endif  // CHROME_BROWSER_POLICY_CLOUD_COMPONENT_CLOUD_POLICY_UPDATER_H_