CroppingWindowCapturer::CreateCapturer() function to replace raw pointer version

webrtc/modules/desktop_capture/cropping_window_capturer.h

 /*
  *  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.
  */
 
 #ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_CROPPING_WINDOW_CAPTURER_H_
 #define WEBRTC_MODULES_DESKTOP_CAPTURE_CROPPING_WINDOW_CAPTURER_H_
 
 #include <memory>
 
 #include "webrtc/modules/desktop_capture/desktop_capturer.h"
 #include "webrtc/modules/desktop_capture/desktop_capture_options.h"
 
 namespace webrtc {
 
 // WindowCapturer implementation that uses a screen capturer to capture the
 // whole screen and crops the video frame to the window area when the captured
 // window is on top.
 class CroppingWindowCapturer : public DesktopCapturer,
                                public DesktopCapturer::Callback {
  public:
+  // Deprecated, use CreateCapturer()
   static DesktopCapturer* Create(const DesktopCaptureOptions& options);
+  static std::unique_ptr<DesktopCapturer> CreateCapturer(
+      const DesktopCaptureOptions& options);
+
   ~CroppingWindowCapturer() override;
 
   // DesktopCapturer implementation.
   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* sources) override;
   bool SelectSource(SourceId id) override;
@@ skipping 27 matching lines @@
   std::unique_ptr<DesktopCapturer> window_capturer_;
   std::unique_ptr<DesktopCapturer> screen_capturer_;
   SourceId selected_window_;
   WindowId excluded_window_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_CROPPING_WINDOW_CAPTURER_H_