Push preg_parser and registry_dict changes upstream

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 <memory>
-#include <string>
-
-#include "base/macros.h"
-#include "base/strings/string16.h"
-#include "components/policy/policy_export.h"
-
-namespace base {
-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:
-  using KeyMap = std::map<std::string,
-                          std::unique_ptr<RegistryDict>,
-                          CaseInsensitiveStringCompare>;
-  using ValueMap = std::map<std::string,
-                            std::unique_ptr<base::Value>,
-                            CaseInsensitiveStringCompare>;
-
-  RegistryDict();
-  ~RegistryDict();
-
-  // Returns a pointer to an existing key, NULL if not present.
-  RegistryDict* GetKey(const std::string& name);
-  const RegistryDict* GetKey(const std::string& name) const;
-  // Sets a key. If |dict| is NULL, clears that key.
-  void SetKey(const std::string& name, std::unique_ptr<RegistryDict> dict);
-  // Removes a key. If the key doesn't exist, NULL is returned.
-  std::unique_ptr<RegistryDict> RemoveKey(const std::string& name);
-  // Clears all keys.
-  void ClearKeys();
-
-  // Returns a pointer to a value, NULL if not present.
-  base::Value* GetValue(const std::string& name);
-  const base::Value* GetValue(const std::string& name) const;
-  // Sets a value. If |value| is NULL, removes the value.
-  void SetValue(const std::string& name, std::unique_ptr<base::Value> value);
-  // Removes a value. If the value doesn't exist, NULL is returned.
-  std::unique_ptr<base::Value> RemoveValue(const std::string& name);
-  // Clears all values.
-  void ClearValues();
-
-  // 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| is used to determine the expected type
-  // for each policy.
-  // The returned object is either a base::DictionaryValue or a base::ListValue.
-  std::unique_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_