base/win: Add documentation to RegKey::Read/Write functions.

base/win/win_util.cc

 // Copyright (c) 2011 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 "base/win/win_util.h"
 
 #include <aclapi.h>
 #include <shobjidl.h>  // Must be before propkey.
 #include <propkey.h>
 #include <propvarutil.h>
@@ skipping 72 matching lines @@
 bool UserAccountControlIsEnabled() {
   // This can be slow if Windows ends up going to disk.  Should watch this key
   // for changes and only read it once, preferably on the file thread.
   //   http://code.google.com/p/chromium/issues/detail?id=61644
   base::ThreadRestrictions::ScopedAllowIO allow_io;
 
   base::win::RegKey key(HKEY_LOCAL_MACHINE,
       L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System",
       KEY_READ);
   DWORD uac_enabled;
-  if (key.ReadValueDW(L"EnableLUA", &uac_enabled) != ERROR_SUCCESS)
+  if (key.ReadValue(L"EnableLUA", &uac_enabled) != ERROR_SUCCESS)
     return true;
   // Users can set the EnableLUA value to something arbitrary, like 2, which
   // Vista will treat as UAC enabled, so we make sure it is not set to 0.
   return (uac_enabled != 0);
 }
 
 bool SetAppIdForPropertyStore(IPropertyStore* property_store,
                               const wchar_t* app_id) {
   DCHECK(property_store);
 
@@ skipping 54 matching lines @@
 
 #ifndef COPY_FILE_COPY_SYMLINK
 #error You must install the Windows 2008 or Vista Software Development Kit and \
 set it as your default include path to build this library. You can grab it by \
 searching for "download windows sdk 2008" in your favorite web search engine.  \
 Also make sure you register the SDK with Visual Studio, by selecting \
 "Integrate Windows SDK with Visual Studio 2005" from the Windows SDK \
 menu (see Start - All Programs - Microsoft Windows SDK - \
 Visual Studio Registration).
 #endif