Reland r57575 - Remove the default argument from RegKey::Open.

chrome/browser/extensions/external_registry_extension_provider_win.cc

Index: chrome/browser/extensions/external_registry_extension_provider_win.cc
diff --git a/chrome/browser/extensions/external_registry_extension_provider_win.cc b/chrome/browser/extensions/external_registry_extension_provider_win.cc
index d34735fbfa9610c9641b7427adc191893b6105d8..35ed4ae091230a657baaffb5dc6fa03ee6ef8d26 100644
--- a/chrome/browser/extensions/external_registry_extension_provider_win.cc
+++ b/chrome/browser/extensions/external_registry_extension_provider_win.cc
@@ -37,7 +37,7 @@ void ExternalRegistryExtensionProvider::VisitRegisteredExtension(
     std::wstring key_path = ASCIIToWide(kRegistryExtensions);
     key_path.append(L"\\");
     key_path.append(iterator.Name());
-    if (key.Open(kRegRoot, key_path.c_str())) {
+    if (key.Open(kRegRoot, key_path.c_str(), KEY_READ)) {
       std::wstring extension_path;
       if (key.ReadValue(kRegistryExtensionPath, &extension_path)) {
         std::wstring extension_version;
@@ -77,7 +77,7 @@ Version* ExternalRegistryExtensionProvider::RegisteredVersion(
   key_path.append(L"\\");
   key_path.append(ASCIIToWide(id));
 
-  if (!key.Open(kRegRoot, key_path.c_str()))
+  if (!key.Open(kRegRoot, key_path.c_str(), KEY_READ))
     return NULL;
 
   std::wstring extension_version;