Cleanup Registry API: part 3.

- Remove the default arguments from the constructor.
- Add a empty constructor to handle the case of the default arguments were used.

BUG=44644
TEST=trybots

Review URL: http://codereview.chromium.org/3172009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@56123 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 10 insertions, 4 deletions

diff --git a/base/registry.cc b/base/registry.cc
index 0040e1a..f8e58b9 100644
--- a/base/registry.cc
+++ b/base/registry.cc
@@ -132,6 +132,11 @@ DWORD RegistryKeyIterator::SubkeyCount() const {
   return count;
 }
 
+RegKey::RegKey()
+    : key_(NULL),
+      watch_event_(0) {
+}
+
 RegKey::RegKey(HKEY rootkey, const wchar_t* subkey, REGSAM access)
     : key_(NULL),
       watch_event_(0) {
diff --git a/base/registry.h b/base/registry.h
index 4702a78..b9427ea 100644
--- a/base/registry.h
+++ b/base/registry.h
@@ -20,8 +20,8 @@
 // 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);
diff --git a/base/win_util.cc b/base/win_util.cc
index 12cf241..49a20c8 100644
--- a/base/win_util.cc
+++ b/base/win_util.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -350,7 +350,8 @@ std::wstring GetClassName(HWND window) {
 
 bool UserAccountControlIsEnabled() {
   RegKey key(HKEY_LOCAL_MACHINE,
-      L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System");
+      L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System",
+      KEY_READ);
   DWORD uac_enabled;
   if (!key.ReadValueDW(L"EnableLUA", &uac_enabled))
     return true;