base/win: small improvement to RegKey API.

chrome/installer/util/install_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.
 //
 // See the corresponding header file for description of the functions in this
 // file.
 
 #include "chrome/installer/util/install_util.h"
 
 #include <shellapi.h>
@@ skipping 357 matching lines @@
 }
 
 // This method tries to delete a registry value and logs an error message
 // in case of failure. It returns true if deletion is successful,
 // otherwise false.
 bool InstallUtil::DeleteRegistryValue(HKEY reg_root,
                                       const std::wstring& key_path,
                                       const std::wstring& value_name) {
   RegKey key(reg_root, key_path.c_str(), KEY_ALL_ACCESS);
   VLOG(1) << "Deleting registry value " << value_name;
-  if (key.ValueExists(value_name.c_str())) {
+  if (key.HasValue(value_name.c_str())) {
     LONG result = key.DeleteValue(value_name.c_str());
     if (result != ERROR_SUCCESS) {
       LOG(ERROR) << "Failed to delete registry value: " << value_name
                  << " error: " << result;
       return false;
     }
   }
   return true;
 }
 
@@ skipping 73 matching lines @@
   int len = GetDateFormatW(LOCALE_INVARIANT, 0, NULL, kDateFormat,
                            date_str, arraysize(date_str));
   if (len) {
     --len;  // Subtract terminating \0.
   } else {
     PLOG(DFATAL) << "GetDateFormat";
   }
 
   return std::wstring(date_str, len);
 }