Delete WindowPicker class and subclasses.

webrtc/base/macwindowpicker.h

-/*
- *  Copyright 2010 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-#ifndef WEBRTC_BASE_MACWINDOWPICKER_H_
-#define WEBRTC_BASE_MACWINDOWPICKER_H_
-
-#include "webrtc/base/windowpicker.h"
-
-namespace rtc {
-
-class MacWindowPicker : public WindowPicker {
- public:
-  MacWindowPicker();
-  ~MacWindowPicker() override;
-  bool Init() override;
-  bool IsVisible(const WindowId& id) override;
-  bool MoveToFront(const WindowId& id) override;
-  bool GetWindowList(WindowDescriptionList* descriptions) override;
-  bool GetDesktopList(DesktopDescriptionList* descriptions) override;
-  bool GetDesktopDimensions(const DesktopId& id,
-                            int* width,
-                            int* height) override;
-
- private:
-  void* lib_handle_;
-  void* get_window_list_;
-  void* get_window_list_desc_;
-};
-
-}  // namespace rtc
-
-#endif  // WEBRTC_BASE_MACWINDOWPICKER_H_