Add CreateWindowCapturer() and CreateScreenCapturer() in DesktopCapturer

webrtc/modules/desktop_capture/window_capturer_mac.mm

 /*
  *  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 223 matching lines @@
     full_screen_chrome_window_detector_->UpdateWindowListIfNeeded(window_id_);
 }
 
 }  // namespace
 
 // static
 WindowCapturer* WindowCapturer::Create(const DesktopCaptureOptions& options) {
   return new WindowCapturerMac(options.full_screen_chrome_window_detector());
 }
 
+// static
+std::unique_ptr<DesktopCapturer> DesktopCapturer::CreateRawWindowCapturer(
+    const DesktopCaptureOptions& options) {
+  return std::unique_ptr<DesktopCapturer>(
+      new WindowCapturerMac(options.full_screen_chrome_window_detector()));
+}
+
 }  // namespace webrtc