Move PolicySchema and PolicySchemaRegistry to components/policy/.

chrome/browser/policy/schema_registry.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_SCHEMA_REGISTRY_H_
-#define CHROME_BROWSER_POLICY_SCHEMA_REGISTRY_H_
-
-#include <set>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/observer_list.h"
-#include "base/threading/non_thread_safe.h"
-#include "chrome/browser/policy/schema_map.h"
-#include "components/policy/core/common/policy_namespace.h"
-#include "components/policy/core/common/schema.h"
-
-namespace policy {
-
-class SchemaMap;
-
-// Holds the main reference to the current SchemaMap, and allows a list of
-// observers to get notified whenever it is updated.
-// This object is not thread safe and must be used from the owner's thread,
-// usually UI.
-class SchemaRegistry : public base::NonThreadSafe {
- public:
-  class Observer {
-   public:
-    // Invoked whenever schemas are registered or unregistered.
-    // |has_new_schemas| is true if a new component has been registered since
-    // the last update; this allows observers to ignore updates when
-    // components are unregistered but still get a handle to the current map
-    // (e.g. for periodic reloads).
-    virtual void OnSchemaRegistryUpdated(bool has_new_schemas) = 0;
-
-    // Invoked when all policy domains become ready.
-    virtual void OnSchemaRegistryReady() = 0;
-
-   protected:
-    virtual ~Observer();
-  };
-
-  SchemaRegistry();
-  virtual ~SchemaRegistry();
-
-  const scoped_refptr<SchemaMap>& schema_map() const { return schema_map_; }
-
-  // Register a single component.
-  void RegisterComponent(const PolicyNamespace& ns,
-                         const Schema& schema);
-
-  // Register a list of components for a given domain.
-  virtual void RegisterComponents(PolicyDomain domain,
-                                  const ComponentMap& components);
-
-  virtual void UnregisterComponent(const PolicyNamespace& ns);
-
-  // Returns true if all domains have registered the initial components.
-  bool IsReady() const;
-
-  // This indicates that the initial components for |domain| have all been
-  // registered. It must be invoked at least once for each policy domain;
-  // subsequent calls for the same domain are ignored.
-  void SetReady(PolicyDomain domain);
-
-  void AddObserver(Observer* observer);
-  void RemoveObserver(Observer* observer);
-
-  bool HasObservers() const;
-
- protected:
-  void Notify(bool has_new_schemas);
-
-  scoped_refptr<SchemaMap> schema_map_;
-
- private:
-  ObserverList<Observer, true> observers_;
-  bool domains_ready_[POLICY_DOMAIN_SIZE];
-
-  DISALLOW_COPY_AND_ASSIGN(SchemaRegistry);
-};
-
-// A registry that combines the maps of other registries.
-class CombinedSchemaRegistry : public SchemaRegistry,
-                               public SchemaRegistry::Observer {
- public:
-  CombinedSchemaRegistry();
-  virtual ~CombinedSchemaRegistry();
-
-  void Track(SchemaRegistry* registry);
-  void Untrack(SchemaRegistry* registry);
-
-  virtual void RegisterComponents(PolicyDomain domain,
-                                  const ComponentMap& components) OVERRIDE;
-
-  virtual void UnregisterComponent(const PolicyNamespace& ns) OVERRIDE;
-
-  virtual void OnSchemaRegistryUpdated(bool has_new_schemas) OVERRIDE;
-
-  virtual void OnSchemaRegistryReady() OVERRIDE;
-
- private:
-  void Combine(bool has_new_schemas);
-
-  std::set<SchemaRegistry*> registries_;
-  scoped_refptr<SchemaMap> own_schema_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(CombinedSchemaRegistry);
-};
-
-}  // namespace policy
-
-#endif  // CHROME_BROWSER_POLICY_SCHEMA_REGISTRY_H_