Revert 57572 - Remove the default argument from RegKey::Open....

chrome/browser/extensions/external_registry_extension_provider_win.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/browser/extensions/external_registry_extension_provider_win.h"
 
 #include "base/file_path.h"
 #include "base/registry.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 19 matching lines @@
 
 void ExternalRegistryExtensionProvider::VisitRegisteredExtension(
     Visitor* visitor, const std::set<std::string>& ids_to_ignore) const {
   RegistryKeyIterator iterator(kRegRoot,
                                ASCIIToWide(kRegistryExtensions).c_str());
   while (iterator.Valid()) {
     RegKey key;
     std::wstring key_path = ASCIIToWide(kRegistryExtensions);
     key_path.append(L"\\");
     key_path.append(iterator.Name());
-    if (key.Open(kRegRoot, key_path.c_str(), KEY_READ)) {
+    if (key.Open(kRegRoot, key_path.c_str())) {
       std::wstring extension_path;
       if (key.ReadValue(kRegistryExtensionPath, &extension_path)) {
         std::wstring extension_version;
         if (key.ReadValue(kRegistryExtensionVersion, &extension_version)) {
           std::string id = WideToASCII(iterator.Name());
           StringToLowerASCII(&id);
           if (ids_to_ignore.find(id) != ids_to_ignore.end()) {
             ++iterator;
             continue;
           }
@@ skipping 19 matching lines @@
 }
 
 Version* ExternalRegistryExtensionProvider::RegisteredVersion(
     const std::string& id,
     Extension::Location* location) const  {
   RegKey key;
   std::wstring key_path = ASCIIToWide(kRegistryExtensions);
   key_path.append(L"\\");
   key_path.append(ASCIIToWide(id));
 
-  if (!key.Open(kRegRoot, key_path.c_str(), KEY_READ))
+  if (!key.Open(kRegRoot, key_path.c_str()))
     return NULL;
 
   std::wstring extension_version;
   if (!key.ReadValue(kRegistryExtensionVersion, &extension_version))
     return NULL;
 
   if (location)
     *location = Extension::EXTERNAL_REGISTRY;
   return Version::GetVersionFromString(extension_version);
 }