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

chrome/installer/util/google_update_settings_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 <windows.h>
 #include <shlwapi.h>  // For SHDeleteKey.
 
 #include "base/memory/scoped_ptr.h"
 #include "base/win/registry.h"
 #include "chrome/common/chrome_constants.h"
@@ skipping 429 matching lines @@
       BrowserDistribution::GetSpecificDistribution(
           BrowserDistribution::CHROME_BROWSER);
 
   // eulaconsent is set on both the product and the binaries.
   EXPECT_TRUE(GoogleUpdateSettings::SetEULAConsent(machine_state, chrome,
                                                    true));
   EXPECT_EQ(ERROR_SUCCESS,
       key.Open(HKEY_LOCAL_MACHINE, binaries->GetStateMediumKey().c_str(),
                KEY_QUERY_VALUE));
   EXPECT_EQ(ERROR_SUCCESS,
-      key.ReadValueDW(google_update::kRegEULAAceptedField, &value));
+      key.ReadValue(google_update::kRegEULAAceptedField, &value));
   EXPECT_EQ(1U, value);
   EXPECT_EQ(ERROR_SUCCESS,
       key.Open(HKEY_LOCAL_MACHINE, chrome->GetStateMediumKey().c_str(),
                KEY_QUERY_VALUE));
   EXPECT_EQ(ERROR_SUCCESS,
-      key.ReadValueDW(google_update::kRegEULAAceptedField, &value));
+      key.ReadValue(google_update::kRegEULAAceptedField, &value));
   EXPECT_EQ(1U, value);
 }
 
 // Test that the appropriate default is returned if no update override is
 // present.
 TEST_F(GoogleUpdateSettingsTest, GetAppUpdatePolicyNoOverride) {
   // There are no policies at all.
   EXPECT_EQ(ERROR_FILE_NOT_FOUND,
             RegKey().Open(HKEY_LOCAL_MACHINE, kGoogleUpdatePoliciesKey,
                           KEY_QUERY_VALUE));
@@ skipping 113 matching lines @@
                    KEY_SET_VALUE).WriteValue(app_policy_value.c_str(),
                                              static_cast<DWORD>(3)));
   is_overridden = true;
   EXPECT_EQ(GoogleUpdateSettings::UPDATES_DISABLED,
             GoogleUpdateSettings::GetAppUpdatePolicy(kTestProductGuid,
                                                      &is_overridden));
   EXPECT_FALSE(is_overridden);
 }
 
 #endif  // defined(GOOGLE_CHROME_BUILD)