Move policy code into components/policy.

chrome/browser/policy/cloud/cloud_external_data_manager.h

-// Copyright 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_CLOUD_EXTERNAL_DATA_MANAGER_H_
-#define CHROME_BROWSER_POLICY_CLOUD_CLOUD_EXTERNAL_DATA_MANAGER_H_
-
-#include <map>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "components/policy/core/common/external_data_manager.h"
-
-namespace net {
-class URLRequestContextGetter;
-}
-
-namespace policy {
-
-class CloudPolicyStore;
-
-// Downloads, verifies, caches and retrieves external data referenced by
-// policies.
-// This a common base class used by cloud policy implementations and mocks.
-class CloudExternalDataManager : public ExternalDataManager {
- public:
-  struct MetadataEntry {
-    MetadataEntry();
-    MetadataEntry(const std::string& url, const std::string& hash);
-
-    bool operator!=(const MetadataEntry& other) const;
-
-    std::string url;
-    std::string hash;
-  };
-  // Maps from policy names to the metadata specifying the external data that
-  // each of the policies references.
-  typedef std::map<std::string, MetadataEntry> Metadata;
-
-  CloudExternalDataManager();
-  virtual ~CloudExternalDataManager();
-
-  // Sets the source of external data references to |policy_store|. The manager
-  // will start observing |policy_store| so that when external data references
-  // change, obsolete data can be deleted and new data can be downloaded. If the
-  // |policy_store| is destroyed before the manager, the connection must be
-  // severed first by calling SetPolicyStore(NULL).
-  virtual void SetPolicyStore(CloudPolicyStore* policy_store);
-
-  // Called by the |policy_store_| when policy changes.
-  virtual void OnPolicyStoreLoaded() = 0;
-
-  // Allows the manager to download external data by constructing URLFetchers
-  // from |request_context|.
-  virtual void Connect(
-      scoped_refptr<net::URLRequestContextGetter> request_context) = 0;
-
-  // Prevents further external data downloads and aborts any downloads currently
-  // in progress.
-  virtual void Disconnect() = 0;
-
- protected:
-  CloudPolicyStore* policy_store_;  // Not owned.
-
-  base::WeakPtrFactory<CloudExternalDataManager> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(CloudExternalDataManager);
-};
-
-}  // namespace policy
-
-#endif  // CHROME_BROWSER_POLICY_CLOUD_CLOUD_EXTERNAL_DATA_MANAGER_H_