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

chrome/installer/util/app_command.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/installer/util/app_command.h"
 
 #include "base/logging.h"
 #include "base/win/registry.h"
 #include "chrome/installer/util/google_update_constants.h"
 #include "chrome/installer/util/work_item_list.h"
@@ skipping 24 matching lines @@
   DWORD sends_pings = 0;
   DWORD is_web_acc = 0;
 
   result = key.ReadValue(google_update::kRegCommandLineField, &cmd_line);
   if (result != ERROR_SUCCESS) {
     LOG(WARNING) << "Error reading " << google_update::kRegCommandLineField
                  << " value from registry: " << result;
     return false;
   }
 
-  result = key.ReadValueDW(google_update::kRegSendsPingsField, &sends_pings);
+  result = key.ReadValue(google_update::kRegSendsPingsField, &sends_pings);
   if (result != ERROR_SUCCESS) {
     LOG(WARNING) << "Error reading " << google_update::kRegSendsPingsField
                  << " value from registry: " << result;
     return false;
   }
 
-  result = key.ReadValueDW(google_update::kRegWebAccessibleField, &is_web_acc);
+  result = key.ReadValue(google_update::kRegWebAccessibleField, &is_web_acc);
   if (result != ERROR_SUCCESS) {
     LOG(WARNING) << "Error reading " << google_update::kRegWebAccessibleField
                  << " value from registry: " << result;
     return false;
   }
 
   command_line_.swap(cmd_line);
   sends_pings_ = (sends_pings != 0);
   is_web_accessible_ = (is_web_acc != 0);
 
@@ skipping 16 matching lines @@
                                     google_update::kRegSendsPingsField,
                                     sends_pings, true)
       ->set_log_message("setting quick-enable-cf SendsPings registry value");
   item_list->AddSetRegValueWorkItem(predefined_root, command_path,
                                     google_update::kRegWebAccessibleField,
                                     is_web_accessible, true)
       ->set_log_message("setting quick-enable-cf WebAccessible registry value");
 }
 
 }  // namespace installer