Added a SchemaMap.

chrome/browser/policy/schema_map.h

Index: chrome/browser/policy/schema_map.h
diff --git a/chrome/browser/policy/schema_map.h b/chrome/browser/policy/schema_map.h
new file mode 100644
index 0000000000000000000000000000000000000000..9af75f028954d580c02d4bf388df4284e2d53595
--- /dev/null
+++ b/chrome/browser/policy/schema_map.h
@@ -0,0 +1,53 @@
+// 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_MAP_H_
+#define CHROME_BROWSER_POLICY_SCHEMA_MAP_H_
+
+#include <map>
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "components/policy/core/common/policy_namespace.h"
+#include "components/policy/core/common/schema.h"
+
+namespace policy {
+
+class PolicyBundle;
+
+typedef std::map<std::string, Schema> ComponentMap;
+typedef std::map<PolicyDomain, ComponentMap> DomainMap;
+
+// Contains a mapping of policy namespaces (domain + component ID) to its
+// corresponding Schema.
+class SchemaMap : public base::RefCountedThreadSafe<SchemaMap> {
+ public:
+  SchemaMap();
+  // Takes ownership of |map| (its contents will be swapped).
+  explicit SchemaMap(DomainMap& map);
+
+  const DomainMap& GetDomains() const;
+
+  const ComponentMap* GetComponents(PolicyDomain domain) const;
+
+  const Schema* GetSchema(const PolicyNamespace& ns) const;
+
+  // Removes all the policies in |bundle| that don't match the known schemas.
+  // Unknown components are also dropped.
+  void FilterBundle(PolicyBundle* bundle) const;
+
+ private:
+  friend class base::RefCountedThreadSafe<SchemaMap>;
+
+  ~SchemaMap();
+
+  DomainMap map_;
+
+  DISALLOW_COPY_AND_ASSIGN(SchemaMap);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_POLICY_SCHEMA_MAP_H_