Tommi: I need an owner review for the chrome frame changes.

base/test/test_reg_util_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/test/test_reg_util_win.h"
+
+#include "base/logging.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace registry_util {
+
+const wchar_t RegistryOverrideManager::kTempTestKeyPath[] =
+    L"Software\\Chromium\\TempTestKeys";
+
+RegistryOverrideManager::ScopedRegistryKeyOverride::ScopedRegistryKeyOverride(
+    HKEY override,
+    const std::wstring& temp_name)
+    : override_(override),
+      temp_name_(temp_name) {
+  DCHECK(!temp_name_.empty());
+  std::wstring key_path(RegistryOverrideManager::kTempTestKeyPath);
+  key_path += L"\\" + temp_name_;
+  EXPECT_EQ(ERROR_SUCCESS,
+      temp_key_.Create(HKEY_CURRENT_USER, key_path.c_str(), KEY_ALL_ACCESS));
+  EXPECT_EQ(ERROR_SUCCESS,
+            ::RegOverridePredefKey(override_, temp_key_.Handle()));
+}
+
+RegistryOverrideManager::
+    ScopedRegistryKeyOverride::~ScopedRegistryKeyOverride() {
+  ::RegOverridePredefKey(override_, NULL);
+  // The temp key will be deleted via a call to DeleteAllTempKeys().
+}
+
+RegistryOverrideManager::RegistryOverrideManager() {
+  DeleteAllTempKeys();
+}
+
+RegistryOverrideManager::~RegistryOverrideManager() {
+  RemoveAllOverrides();
+}
+
+void RegistryOverrideManager::OverrideRegistry(HKEY override,
+                                               const std::wstring& temp_name) {
+  overrides_.push_back(new ScopedRegistryKeyOverride(override, temp_name));
+}
+
+void RegistryOverrideManager::RemoveAllOverrides() {
+  while (!overrides_.empty()) {
+    delete overrides_.back();
+    overrides_.pop_back();
+  }
+
+  DeleteAllTempKeys();
+}
+
+// static
+void RegistryOverrideManager::DeleteAllTempKeys() {
+  base::win::RegKey key;
+  if (key.Open(HKEY_CURRENT_USER, L"", KEY_ALL_ACCESS) == ERROR_SUCCESS) {
+    key.DeleteKey(kTempTestKeyPath);
+  }
+}
+
+}  // namespace registry_util