Use schemas bundled in extensions to convert policies loaded on Windows.

components/policy/core/common/registry_dict_win.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 COMPONENTS_POLICY_CORE_COMMON_REGISTRY_DICT_WIN_H_
 #define COMPONENTS_POLICY_CORE_COMMON_REGISTRY_DICT_WIN_H_
 
 #include <windows.h>
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "components/policy/policy_export.h"
 
 namespace base {
-class DictionaryValue;
 class Value;
 }
 
 namespace policy {
 
+class Schema;
+
 // A case-insensitive string comparison functor.
 struct POLICY_EXPORT CaseInsensitiveStringCompare {
   bool operator()(const std::string& a, const std::string& b) const;
 };
 
 // In-memory representation of a registry subtree. Using a
 // base::DictionaryValue directly seems tempting, but that doesn't handle the
 // registry's case-insensitive-but-case-preserving semantics properly.
 class POLICY_EXPORT RegistryDict {
  public:
@@ skipping 28 matching lines @@
   // Merge keys and values from |other|, giving precedence to |other|.
   void Merge(const RegistryDict& other);
 
   // Swap with |other|.
   void Swap(RegistryDict* other);
 
   // Read a Windows registry subtree into this registry dictionary object.
   void ReadRegistry(HKEY hive, const base::string16& root);
 
   // Converts the dictionary to base::Value representation. For key/value name
-  // collisions, the key wins. |schema| supplies an optional JSON schema that
-  // will be used to map types to base::Value types. The returned object is
-  // either a base::DictionaryValue or a base::ListValue.
-  scoped_ptr<base::Value> ConvertToJSON(
-      const base::DictionaryValue* schema) const;
+  // collisions, the key wins. |schema| is used to determine the expected type
+  // for each policy.
+  // The returned object is either a base::DictionaryValue or a base::ListValue.
+  scoped_ptr<base::Value> ConvertToJSON(const Schema& schema) const;
 
   const KeyMap& keys() const { return keys_; }
   const ValueMap& values() const { return values_; }
 
  private:
   KeyMap keys_;
   ValueMap values_;
 
   DISALLOW_COPY_AND_ASSIGN(RegistryDict);
 };
 
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_REGISTRY_DICT_WIN_H_