Revert of Add CreateWindowCapturer() and CreateScreenCapturer() in DesktopCapturer

webrtc/modules/desktop_capture/desktop_capturer_differ_wrapper.h

-/*
- *  Copyright (c) 2016 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_MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURER_DIFFER_WRAPPER_H_
-#define WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURER_DIFFER_WRAPPER_H_
-
-#include <memory>
-
-#include "webrtc/modules/desktop_capture/desktop_capturer.h"
-#include "webrtc/modules/desktop_capture/shared_desktop_frame.h"
-
-namespace webrtc {
-
-// DesktopCapturer wrapper that calculates updated_region() by comparing frames
-// content. This class always expects the underlying DesktopCapturer
-// implementation returns a superset of updated regions in DestkopFrame. If a
-// DesktopCapturer implementation does not know the updated region, it should
-// set updated_region() to full frame.
-//
-// This class marks entire frame as updated if the frame size or frame stride
-// has been changed.
-class DesktopCapturerDifferWrapper : public DesktopCapturer,
-                                     public DesktopCapturer::Callback {
- public:
-  // Creates a DesktopCapturerDifferWrapper with a DesktopCapturer
-  // implementation, and takes its ownership.
-  explicit DesktopCapturerDifferWrapper(
-      std::unique_ptr<DesktopCapturer> base_capturer);
-
-  ~DesktopCapturerDifferWrapper() override;
-
-  // DesktopCapturer interface.
-  void Start(DesktopCapturer::Callback* callback) override;
-  void SetSharedMemoryFactory(
-      std::unique_ptr<SharedMemoryFactory> shared_memory_factory) override;
-  void CaptureFrame() override;
-  void SetExcludedWindow(WindowId window) override;
-  bool GetSourceList(SourceList* screens) override;
-  bool SelectSource(SourceId id) override;
-  bool FocusOnSelectedSource() override;
-
- private:
-  // DesktopCapturer::Callback interface.
-  void OnCaptureResult(Result result,
-                       std::unique_ptr<DesktopFrame> frame) override;
-
-  const std::unique_ptr<DesktopCapturer> base_capturer_;
-  DesktopCapturer::Callback* callback_;
-  std::unique_ptr<SharedDesktopFrame> last_frame_;
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURER_DIFFER_WRAPPER_H_