Move base to DEPS

base/system_monitor/system_monitor.h

-// Copyright (c) 2012 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.
-
-#ifndef BASE_SYSTEM_MONITOR_SYSTEM_MONITOR_H_
-#define BASE_SYSTEM_MONITOR_SYSTEM_MONITOR_H_
-
-#include "base/base_export.h"
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "base/observer_list_threadsafe.h"
-#include "build/build_config.h"
-
-namespace base {
-
-// Class for monitoring various system-related subsystems
-// such as power management, network status, etc.
-// TODO(mbelshe):  Add support beyond just power management.
-class BASE_EXPORT SystemMonitor {
- public:
-  // Type of devices whose change need to be monitored, such as add/remove.
-  enum DeviceType {
-    DEVTYPE_AUDIO_CAPTURE,  // Audio capture device, e.g., microphone.
-    DEVTYPE_VIDEO_CAPTURE,  // Video capture device, e.g., webcam.
-    DEVTYPE_UNKNOWN,  // Other devices.
-  };
-
-  // Create SystemMonitor. Only one SystemMonitor instance per application
-  // is allowed.
-  SystemMonitor();
-  ~SystemMonitor();
-
-  // Get the application-wide SystemMonitor (if not present, returns NULL).
-  static SystemMonitor* Get();
-
-  class BASE_EXPORT DevicesChangedObserver {
-   public:
-    // Notification that the devices connected to the system have changed.
-    // This is only implemented on Windows currently.
-    virtual void OnDevicesChanged(DeviceType device_type) {}
-
-   protected:
-    virtual ~DevicesChangedObserver() {}
-  };
-
-  // Add a new observer.
-  // Can be called from any thread.
-  // Must not be called from within a notification callback.
-  void AddDevicesChangedObserver(DevicesChangedObserver* obs);
-
-  // Remove an existing observer.
-  // Can be called from any thread.
-  // Must not be called from within a notification callback.
-  void RemoveDevicesChangedObserver(DevicesChangedObserver* obs);
-
-  // The ProcessFoo() style methods are a broken pattern and should not
-  // be copied. Any significant addition to this class is blocked on
-  // refactoring to improve the state of affairs. See http://crbug.com/149059
-
-  // Cross-platform handling of a device change event.
-  void ProcessDevicesChanged(DeviceType device_type);
-
- private:
-  // Functions to trigger notifications.
-  void NotifyDevicesChanged(DeviceType device_type);
-
-  scoped_refptr<ObserverListThreadSafe<DevicesChangedObserver> >
-      devices_changed_observer_list_;
-
-  DISALLOW_COPY_AND_ASSIGN(SystemMonitor);
-};
-
-}  // namespace base
-
-#endif  // BASE_SYSTEM_MONITOR_SYSTEM_MONITOR_H_