Add CreateWindowCapturer() and CreateScreenCapturer() in DesktopCapturer

webrtc/modules/desktop_capture/screen_capturer_win.cc

 /*
  *  Copyright (c) 2013 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 24 matching lines @@
     capturer.reset(new ScreenCapturerWinMagnifier(std::move(capturer)));
   }
 
   if (options.detect_updated_region()) {
     capturer.reset(new ScreenCapturerDifferWrapper(std::move(capturer)));
   }
 
   return capturer.release();
 }
 
+// static
+std::unique_ptr<DesktopCapturer> DesktopCapturer::CreateRawScreenCapturer(
+    const DesktopCaptureOptions& options) {
+  std::unique_ptr<DesktopCapturer> capturer;
+  if (options.allow_directx_capturer() &&
+      ScreenCapturerWinDirectx::IsSupported()) {
+    capturer.reset(new ScreenCapturerWinDirectx(options));
+  } else {
+    capturer.reset(new ScreenCapturerWinGdi(options));
+  }
+
+  if (options.allow_use_magnification_api()) {
+    capturer.reset(new ScreenCapturerWinMagnifier(std::move(capturer)));
+  }
+
+  return capturer;
+}
+
 }  // namespace webrtc