base/win: small improvement to RegKey API.

chrome/browser/background/background_mode_manager_win.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/base_paths.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/task.h"
@@ skipping 22 matching lines @@
 const wchar_t* kBackgroundModeRegistrySubkey =
     L"Software\\Microsoft\\Windows\\CurrentVersion\\Run";
 const wchar_t* kBackgroundModeRegistryKeyName = L"chromium";
 
 void DisableLaunchOnStartupTask::Run() {
   const wchar_t* key_name = kBackgroundModeRegistryKeyName;
   base::win::RegKey read_key(kBackgroundModeRegistryRootKey,
                              kBackgroundModeRegistrySubkey, KEY_READ);
   base::win::RegKey write_key(kBackgroundModeRegistryRootKey,
                               kBackgroundModeRegistrySubkey, KEY_WRITE);
-  if (read_key.ValueExists(key_name)) {
+  if (read_key.HasValue(key_name)) {
     LONG result = write_key.DeleteValue(key_name);
     DCHECK_EQ(ERROR_SUCCESS, result) <<
         "Failed to deregister launch on login. error: " << result;
   }
 }
 
 void EnableLaunchOnStartupTask::Run() {
   // TODO(rickcam): Bug 53597: Make RegKey mockable.
   // TODO(rickcam): Bug 53600: Use distinct registry keys per flavor+profile.
   const wchar_t* key_name = kBackgroundModeRegistryKeyName;
   base::win::RegKey read_key(kBackgroundModeRegistryRootKey,
                              kBackgroundModeRegistrySubkey, KEY_READ);
   base::win::RegKey write_key(kBackgroundModeRegistryRootKey,
                               kBackgroundModeRegistrySubkey, KEY_WRITE);
   FilePath executable;
   if (!PathService::Get(base::FILE_EXE, &executable))
     return;
   std::wstring new_value = executable.value() +
       L" --" + ASCIIToUTF16(switches::kNoStartupWindow);
-  if (read_key.ValueExists(key_name)) {
+  if (read_key.HasValue(key_name)) {
     std::wstring current_value;
     if ((read_key.ReadValue(key_name, &current_value) == ERROR_SUCCESS) &&
         (current_value == new_value)) {
       return;
     }
   }
   LONG result = write_key.WriteValue(key_name, new_value.c_str());
   DCHECK_EQ(ERROR_SUCCESS, result) <<
       "Failed to register launch on login. error: " << result;
 }
@@ skipping 22 matching lines @@
       l10n_util::GetStringUTF16(IDS_BACKGROUND_APP_INSTALLED_BALLOON_TITLE),
       l10n_util::GetStringFUTF16(
           IDS_BACKGROUND_APP_INSTALLED_BALLOON_BODY,
           UTF8ToUTF16(extension->name()),
           l10n_util::GetStringUTF16(IDS_PRODUCT_NAME)));
 }
 
 string16 BackgroundModeManager::GetPreferencesMenuLabel() {
   return l10n_util::GetStringUTF16(IDS_OPTIONS);
 }