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

chrome_frame/ready_mode/internal/registry_ready_mode_state.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 "chrome_frame/ready_mode/internal/registry_ready_mode_state.h"
 
 #include <windows.h>
 
 #include "base/logging.h"
 #include "base/process_util.h"
@@ skipping 186 matching lines @@
 bool RegistryReadyModeState::GetStateFromRegistry(int64* value, bool* exists) {
   *exists = false;
   *value = 0;
 
   HKEY roots[] = { HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE };
   LONG result = ERROR_SUCCESS;
   for (int i = 0; i < arraysize(roots); i++) {
     base::win::RegKey config_key;
     result = config_key.Open(roots[i], key_name_.c_str(), KEY_QUERY_VALUE);
     if (result == ERROR_SUCCESS) {
-      result = config_key.ReadInt64(installer::kChromeFrameReadyModeField,
+      result = config_key.ReadValue(installer::kChromeFrameReadyModeField,
                                     value);
       if (result == ERROR_SUCCESS) {
         *exists = true;
         return true;
       }
       if (result != ERROR_FILE_NOT_FOUND) {
         DLOG(ERROR) << "Failed to read from registry key " << key_name_
                     << " and value " << installer::kChromeFrameReadyModeField
                     << " error: " << result;
         return false;
@@ skipping 28 matching lines @@
 
 void RegistryReadyModeState::PermanentlyDeclineChromeFrame() {
   if (LaunchAndCheckCommand(google_update::kRegCFOptOutCmdField))
     RefreshStateAndNotify();
 }
 
 void RegistryReadyModeState::AcceptChromeFrame() {
   if (LaunchAndCheckCommand(google_update::kRegCFOptInCmdField))
     NotifyObserver();
 }