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

chrome/installer/util/install_util_unittest.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 <string>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/test/test_reg_util_win.h"
 #include "base/win/registry.h"
@@ skipping 119 matching lines @@
   {
     RegistryOverrideManager override_manager;
     override_manager.OverrideRegistry(root, L"root_inst_res");
     RegKey(root, state_key_path.c_str(), KEY_SET_VALUE)
         .DeleteValue(installer::kInstallerExtraCode1);
     InstallUtil::UpdateInstallerStage(system_level, state_key_path,
                                       installer::BUILDING);
     DWORD value;
     EXPECT_EQ(ERROR_SUCCESS,
               RegKey(root, state_key_path.c_str(), KEY_QUERY_VALUE)
-                  .ReadValueDW(installer::kInstallerExtraCode1, &value));
+                  .ReadValue(installer::kInstallerExtraCode1, &value));
     EXPECT_EQ(static_cast<DWORD>(installer::BUILDING), value);
   }
 
   // Update the stage when there is an "InstallerExtraCode1" value.
   {
     RegistryOverrideManager override_manager;
     override_manager.OverrideRegistry(root, L"root_inst_res");
     RegKey(root, state_key_path.c_str(), KEY_SET_VALUE)
         .WriteValue(installer::kInstallerExtraCode1,
                     static_cast<DWORD>(installer::UNPACKING));
     InstallUtil::UpdateInstallerStage(system_level, state_key_path,
                                       installer::BUILDING);
     DWORD value;
     EXPECT_EQ(ERROR_SUCCESS,
               RegKey(root, state_key_path.c_str(), KEY_QUERY_VALUE)
-                  .ReadValueDW(installer::kInstallerExtraCode1, &value));
+                  .ReadValue(installer::kInstallerExtraCode1, &value));
     EXPECT_EQ(static_cast<DWORD>(installer::BUILDING), value);
   }
 
   // Clear the stage.
   {
     RegistryOverrideManager override_manager;
     override_manager.OverrideRegistry(root, L"root_inst_res");
     RegKey(root, state_key_path.c_str(), KEY_SET_VALUE)
         .WriteValue(installer::kInstallerExtraCode1, static_cast<DWORD>(5));
     InstallUtil::UpdateInstallerStage(system_level, state_key_path,
                                       installer::NO_STAGE);
     DWORD value;
     EXPECT_EQ(ERROR_FILE_NOT_FOUND,
               RegKey(root, state_key_path.c_str(), KEY_QUERY_VALUE)
-                  .ReadValueDW(installer::kInstallerExtraCode1, &value));
+                  .ReadValue(installer::kInstallerExtraCode1, &value));
   }
 }
 
 TEST_F(InstallUtilTest, DeleteRegistryKeyIf) {
   const HKEY root = HKEY_CURRENT_USER;
   std::wstring parent_key_path(L"SomeKey\\ToDelete");
   std::wstring child_key_path(parent_key_path);
   child_key_path.append(L"\\ChildKey\\WithAValue");
   const wchar_t value_name[] = L"some_value_name";
   const wchar_t value[] = L"hi mom";
@@ skipping 152 matching lines @@
 
 TEST_F(InstallUtilTest, ValueEquals) {
   InstallUtil::ValueEquals pred(L"howdy");
 
   EXPECT_FALSE(pred.Evaluate(L""));
   EXPECT_FALSE(pred.Evaluate(L"Howdy"));
   EXPECT_FALSE(pred.Evaluate(L"howdy!"));
   EXPECT_FALSE(pred.Evaluate(L"!howdy"));
   EXPECT_TRUE(pred.Evaluate(L"howdy"));
 }