Remove DesktopRegion parameter in DesktopCapturer::Capture.

webrtc/modules/desktop_capture/screen_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.
  */
 
@@ skipping 21 matching lines @@
   // Creates a ScreenCapturerDifferWrapper with a ScreenCapturer implementation,
   // and takes its ownership.
   explicit ScreenCapturerDifferWrapper(
       std::unique_ptr<ScreenCapturer> base_capturer);
   ~ScreenCapturerDifferWrapper() override;
 
   // ScreenCapturer interface.
   void Start(DesktopCapturer::Callback* callback) override;
   void SetSharedMemoryFactory(
       std::unique_ptr<SharedMemoryFactory> shared_memory_factory) override;
-  void Capture(const DesktopRegion& region) override;
+  void CaptureFrame() override;
   bool GetScreenList(ScreenList* screens) override;
   bool SelectScreen(ScreenId id) override;
 
  private:
   // DesktopCapturer::Callback interface.
   void OnCaptureResult(Result result,
                        std::unique_ptr<DesktopFrame> frame) override;
 
   const std::unique_ptr<ScreenCapturer> base_capturer_;
   DesktopCapturer::Callback* callback_;
   std::unique_ptr<SharedDesktopFrame> last_frame_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_DIFFER_WRAPPER_H_