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

recovery/repair_exe/custom_action/executecustomaction.h

-// Copyright 2007-2009 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.
-// ========================================================================
-//
-// Header files to precompile for the installer.
-
-#ifndef  OMAHA_RECOVERY_REPAIR_EXE_CUSTOM_ACTION_EXECUTECUSTOMACTION_H__
-#define  OMAHA_RECOVERY_REPAIR_EXE_CUSTOM_ACTION_EXECUTECUSTOMACTION_H__
-
-#include <windows.h>
-#include <msi.h>
-#include <atlbase.h>
-
-namespace omaha {
-
-class CustomActionModule : public CAtlDllModuleT<CustomActionModule> {
- public:
-  CustomActionModule() {}
-  ~CustomActionModule() {}
-};
-
-}  // namespace omaha
-
-extern "C"
-UINT __stdcall VerifyFileAndExecute(MSIHANDLE);
-
-#endif  // OMAHA_RECOVERY_REPAIR_EXE_CUSTOM_ACTION_EXECUTECUSTOMACTION_H__