Keep only base/extractor.[cc|h].

common/oem_install_utils.h

-// Copyright 2010 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-
-#ifndef OMAHA_COMMON_OEM_INSTALL_UTILS_H_
-#define OMAHA_COMMON_OEM_INSTALL_UTILS_H_
-
-#include <windows.h>
-
-namespace omaha {
-
-namespace oem_install_utils {
-
-// Writes OEM install beginning timestamp in the registry.
-HRESULT SetOemInstallState(bool is_machine);
-
-// Removes OEM install beginning timestamp from the registry.
-HRESULT ResetOemInstallState(bool is_machine);
-
-// Returns true if running in the context of an OEM install.
-bool IsOemInstalling(bool is_machine);
-
-}  // namespace oem_install_utils
-
-}  // namespace omaha
-
-#endif  // OMAHA_COMMON_OEM_INSTALL_UTILS_H_