Revert of Move ConfigurationPolicyProvider, etc. to components/policy.

components/policy/core/common/configuration_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 COMPONENTS_POLICY_CORE_COMMON_CONFIGURATION_POLICY_PROVIDER_H_
-#define COMPONENTS_POLICY_CORE_COMMON_CONFIGURATION_POLICY_PROVIDER_H_
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/observer_list.h"
-#include "components/policy/core/common/policy_bundle.h"
-#include "components/policy/core/common/policy_namespace.h"
-#include "components/policy/core/common/schema_registry.h"
-#include "components/policy/policy_export.h"
-
-namespace policy {
-
-// A mostly-abstract super class for platform-specific policy providers.
-// Platform-specific policy providers (Windows Group Policy, gconf,
-// etc.) should implement a subclass of this class.
-class POLICY_EXPORT ConfigurationPolicyProvider
-    : public SchemaRegistry::Observer {
- public:
-  class POLICY_EXPORT Observer {
-   public:
-    virtual ~Observer();
-    virtual void OnUpdatePolicy(ConfigurationPolicyProvider* provider) = 0;
-  };
-
-  ConfigurationPolicyProvider();
-
-  // Policy providers can be deleted quite late during shutdown of the browser,
-  // and it's not guaranteed that the message loops will still be running when
-  // this is invoked. Override Shutdown() instead for cleanup code that needs
-  // to post to the FILE thread, for example.
-  virtual ~ConfigurationPolicyProvider();
-
-  // Invoked as soon as the main message loops are spinning. Policy providers
-  // are created early during startup to provide the initial policies; the
-  // Init() call allows them to perform initialization tasks that require
-  // running message loops.
-  // The policy provider will load policy for the components registered in
-  // the |schema_registry| whose domain is supported by this provider.
-  virtual void Init(SchemaRegistry* registry);
-
-  // Must be invoked before deleting the provider. Implementations can override
-  // this method to do appropriate cleanup while threads are still running, and
-  // must also invoke ConfigurationPolicyProvider::Shutdown().
-  // The provider should keep providing the current policies after Shutdown()
-  // is invoked, it only has to stop updating.
-  virtual void Shutdown();
-
-  // Returns the current PolicyBundle.
-  const PolicyBundle& policies() const { return policy_bundle_; }
-
-  // Check whether this provider has completed initialization for the given
-  // policy |domain|. This is used to detect whether initialization is done in
-  // case implementations need to do asynchronous operations for initialization.
-  virtual bool IsInitializationComplete(PolicyDomain domain) const;
-
-  // Asks the provider to refresh its policies. All the updates caused by this
-  // call will be visible on the next call of OnUpdatePolicy on the observers,
-  // which are guaranteed to happen even if the refresh fails.
-  // It is possible that Shutdown() is called first though, and
-  // OnUpdatePolicy won't be called if that happens.
-  virtual void RefreshPolicies() = 0;
-
-  // Observers must detach themselves before the provider is deleted.
-  virtual void AddObserver(Observer* observer);
-  virtual void RemoveObserver(Observer* observer);
-
-  // SchemaRegistry::Observer:
-  virtual void OnSchemaRegistryUpdated(bool has_new_schemas) OVERRIDE;
-  virtual void OnSchemaRegistryReady() OVERRIDE;
-
- protected:
-  // Subclasses must invoke this to update the policies currently served by
-  // this provider. UpdatePolicy() takes ownership of |policies|.
-  // The observers are notified after the policies are updated.
-  void UpdatePolicy(scoped_ptr<PolicyBundle> bundle);
-
-  SchemaRegistry* schema_registry() const;
-
-  const scoped_refptr<SchemaMap>& schema_map() const;
-
- private:
-  // The policies currently configured at this provider.
-  PolicyBundle policy_bundle_;
-
-  // Whether Shutdown() has been invoked.
-  bool did_shutdown_;
-
-  SchemaRegistry* schema_registry_;
-
-  ObserverList<Observer, true> observer_list_;
-
-  DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyProvider);
-};
-
-}  // namespace policy
-
-#endif  // COMPONENTS_POLICY_CORE_COMMON_CONFIGURATION_POLICY_PROVIDER_H_