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

core/system_monitor.h

-// Copyright 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.
-// ========================================================================
-
-// SystemMonitor receives session messages and power management messages.
-
-#ifndef OMAHA_CORE_SYSTEM_MONITOR_H_
-#define OMAHA_CORE_SYSTEM_MONITOR_H_
-
-#include <atlbase.h>
-#include <atlwin.h>
-#include "base/basictypes.h"
-#include "base/scoped_ptr.h"
-#include "omaha/base/registry_monitor_manager.h"
-
-namespace omaha {
-
-class SystemMonitorObserver {
- public:
-  virtual ~SystemMonitorObserver() {}
-
-  // Called when 'LastChecked' registry value is deleted.
-  virtual void LastCheckedDeleted() = 0;
-
-  // Called when there are no other clients that are registered besides Omaha.
-  virtual void NoRegisteredClients() = 0;
-};
-
-class SystemMonitor
-    : public CWindowImpl<SystemMonitor,
-                         CWindow,
-                         CWinTraits<WS_OVERLAPPED, WS_EX_TOOLWINDOW> > {
- public:
-  explicit SystemMonitor(bool is_machine);
-  ~SystemMonitor();
-
-  HRESULT Initialize(bool monitor_registry);
-
-  void set_observer(SystemMonitorObserver* observer) {
-    ::InterlockedExchangePointer(reinterpret_cast<void**>(&observer_),
-                                 observer);
-  }
-
-  BEGIN_MSG_MAP(SystemMonitor)
-    MESSAGE_HANDLER(WM_POWERBROADCAST,    OnPowerBroadcast)
-    MESSAGE_HANDLER(WM_QUERYENDSESSION,   OnQueryEndSession)
-    MESSAGE_HANDLER(WM_ENDSESSION,        OnEndSession)
-    MESSAGE_HANDLER(WM_WTSSESSION_CHANGE, OnWTSSessionChange)
-  END_MSG_MAP()
-
- private:
-  // Notifies the system monitor that a power-management event has occurred.
-  LRESULT OnPowerBroadcast(UINT msg, WPARAM wparam,
-                           LPARAM lparam, BOOL& handled);
-
-  // Notifies the system monitor a shutdown has been requested.
-  LRESULT OnQueryEndSession(UINT msg, WPARAM wparam,
-                            LPARAM lparam, BOOL& handled);
-
-  // Notifies the system monitor whether the session is ending.
-  LRESULT OnEndSession(UINT msg, WPARAM wparam,
-                       LPARAM lparam, BOOL& handled);
-
-  // Notifies the system monitor about changes in the session state.
-  LRESULT OnWTSSessionChange(UINT msg, WPARAM wparam,
-                             LPARAM lparam, BOOL& handled);
-
-  static void RegistryValueChangeCallback(const TCHAR* key_name,
-                                          const TCHAR* value_name,
-                                          RegistryChangeType change_type,
-                                          const void* new_value_data,
-                                          void* user_data);
-
-  static void RegistryKeyChangeCallback(const TCHAR* key_name,
-                                        void* user_data);
-
-  scoped_ptr<RegistryMonitor> registry_monitor_;
-  bool is_machine_;
-  SystemMonitorObserver* observer_;
-
-  DISALLOW_EVIL_CONSTRUCTORS(SystemMonitor);
-};
-
-}  // namespace omaha
-
-#endif  // OMAHA_CORE_SYSTEM_MONITOR_H_
-