Remove DesktopRegion parameter in DesktopCapturer::Capture.

webrtc/modules/desktop_capture/win/screen_capturer_win_gdi.cc

 /*
  *  Copyright (c) 2014 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 53 matching lines @@
 
   if (dwmapi_library_)
     FreeLibrary(dwmapi_library_);
 }
 
 void ScreenCapturerWinGdi::SetSharedMemoryFactory(
     std::unique_ptr<SharedMemoryFactory> shared_memory_factory) {
   shared_memory_factory_ = std::move(shared_memory_factory);
 }
 
-void ScreenCapturerWinGdi::Capture(const DesktopRegion& region) {
+void ScreenCapturerWinGdi::CaptureFrame() {
   int64_t capture_start_time_nanos = rtc::TimeNanos();
 
   queue_.MoveToNextFrame();
   RTC_DCHECK(!queue_.current_frame() || !queue_.current_frame()->IsShared());
 
   // Make sure the GDI capture resources are up-to-date.
   PrepareCaptureResources();
 
   if (!CaptureImage()) {
     callback_->OnCaptureResult(Result::ERROR_TEMPORARY, nullptr);
@@ skipping 134 matching lines @@
            SRCCOPY | CAPTUREBLT);
 
     // Select back the previously selected object to that the device contect
     // could be destroyed independently of the bitmap if needed.
     SelectObject(memory_dc_, previous_object);
   }
   return true;
 }
 
 }  // namespace webrtc