Policy providers all get a SchemaRegistry to work with.

chrome/browser/policy/policy_domain_descriptor.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_POLICY_DOMAIN_DESCRIPTOR_H_
-#define CHROME_BROWSER_POLICY_POLICY_DOMAIN_DESCRIPTOR_H_
-
-#include <map>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "components/policy/core/common/policy_namespace.h"
-#include "components/policy/core/common/schema.h"
-
-namespace policy {
-
-class PolicyBundle;
-
-// For each policy domain, this class keeps the complete list of valid
-// components for that domain, and the Schema for each component.
-class PolicyDomainDescriptor
-    : public base::RefCountedThreadSafe<PolicyDomainDescriptor> {
- public:
-  typedef std::map<std::string, Schema> SchemaMap;
-
-  explicit PolicyDomainDescriptor(PolicyDomain domain);
-
-  PolicyDomain domain() const { return domain_; }
-  const SchemaMap& components() const { return schema_map_; }
-
-  // Registers the given |component_id| for this domain, and sets its current
-  // |schema|. This registration overrides any previously set schema for this
-  // component.
-  void RegisterComponent(const std::string& component_id, Schema schema);
-
-  // Removes all the policies in |bundle| that don't match this descriptor.
-  // Policies of domains other than |domain_| are ignored.
-  void FilterBundle(PolicyBundle* bundle) const;
-
- private:
-  friend class base::RefCountedThreadSafe<PolicyDomainDescriptor>;
-
-  ~PolicyDomainDescriptor();
-
-  PolicyDomain domain_;
-  SchemaMap schema_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(PolicyDomainDescriptor);
-};
-
-}  // namespace policy
-
-#endif  // CHROME_BROWSER_POLICY_POLICY_DOMAIN_DESCRIPTOR_H_