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

base/shutdown_handler.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.
-// ========================================================================
-
-// ShutdownHandler monitors a shutdown event.
-
-#ifndef OMAHA_BASE_SHUTDOWN_HANDLER_H_
-#define OMAHA_BASE_SHUTDOWN_HANDLER_H_
-
-#include <windows.h>
-#include "base/basictypes.h"
-#include "omaha/base/event_handler.h"
-#include "omaha/base/scoped_any.h"
-
-namespace omaha {
-
-class Reactor;
-class ShutdownCallback;
-
-class ShutdownHandler : public EventHandler {
- public:
-  ShutdownHandler();
-  ~ShutdownHandler();
-
-  HRESULT Initialize(Reactor* reactor,
-                     ShutdownCallback* shutdown,
-                     bool is_machine);
-  virtual void HandleEvent(HANDLE handle);
-
- private:
-  Reactor* reactor_;
-  scoped_event shutdown_event_;
-  ShutdownCallback* shutdown_callback_;
-  bool is_machine_;
-  DISALLOW_EVIL_CONSTRUCTORS(ShutdownHandler);
-};
-
-}  // namespace omaha
-
-#endif  // OMAHA_BASE_SHUTDOWN_HANDLER_H_