Cleanup Registry API: part 3.

base/registry.h

 // Copyright (c) 2010 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 BASE_REGISTRY_H_
 #define BASE_REGISTRY_H_
 #pragma once
 
 #include <windows.h>
 
 #include <string>
 
 #include "base/basictypes.h"
 
 // TODO(tfarina): Get rid of all the default arguments used in this file.
 // They are not allowed by our style guide.
 
 // Utility class to read, write and manipulate the Windows Registry.
 // Registry vocabulary primer: a "key" is like a folder, in which there
 // are "values", which are <name, data> pairs, with an associated data type.
 class RegKey {
  public:
-  RegKey(HKEY rootkey = NULL, const wchar_t* subkey = NULL,
-         REGSAM access = KEY_READ);
+  RegKey();
+  RegKey(HKEY rootkey, const wchar_t* subkey, REGSAM access);
   ~RegKey();
 
   bool Create(HKEY rootkey, const wchar_t* subkey, REGSAM access = KEY_READ);
 
   bool CreateWithDisposition(HKEY rootkey, const wchar_t* subkey,
                              DWORD* disposition, REGSAM access);
 
   bool Open(HKEY rootkey, const wchar_t* subkey, REGSAM access = KEY_READ);
 
   // Creates a subkey or open it if it already exists.
@@ skipping 126 matching lines @@
 
   // Current index of the iteration.
   int index_;
 
   wchar_t name_[MAX_PATH];
 
   DISALLOW_COPY_AND_ASSIGN(RegistryKeyIterator);
 };
 
 #endif  // BASE_REGISTRY_H_