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

webrtc/modules/desktop_capture/cropping_window_capturer.h

Index: webrtc/modules/desktop_capture/cropping_window_capturer.h
diff --git a/webrtc/modules/desktop_capture/cropping_window_capturer.h b/webrtc/modules/desktop_capture/cropping_window_capturer.h
index 4c7c1dbd92f4ba2af49ed8e0d9c3af7897aaf239..fd6663e5c6437068e1f6010613c0ad01b730db56 100644
--- a/webrtc/modules/desktop_capture/cropping_window_capturer.h
+++ b/webrtc/modules/desktop_capture/cropping_window_capturer.h
@@ -24,7 +24,11 @@ namespace webrtc {
 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.