AVFoundationVideoCapturer: Output native frames instead of I420 frames

webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h

Index: webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h
diff --git a/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h b/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h
index c523b527bbb0de88ee9adf88139e4d8348bbf1cd..37378e7da183edfdc0e91fce42f8a66ed247fbe8 100644
--- a/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h
+++ b/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.h
@@ -13,6 +13,7 @@
 
 #import <AVFoundation/AVFoundation.h>
 
+#include "webrtc/common_video/include/i420_buffer_pool.h"
 #include "webrtc/media/base/videocapturer.h"
 #include "webrtc/video_frame.h"
 
@@ -61,10 +62,11 @@ class AVFoundationVideoCapturer : public cricket::VideoCapturer,
   void OnMessage(rtc::Message *msg) override;
 
  private:
-  void OnFrameMessage(CVImageBufferRef image_buffer, int64_t capture_time);
+  void OnFrameMessage(CVImageBufferRef image_buffer, int64_t capture_time_ns);
 
   RTCAVFoundationVideoCapturerInternal *_capturer;
   rtc::Thread *_startThread;  // Set in Start(), unset in Stop().
+  webrtc::I420BufferPool _buffer_pool;
 };  // AVFoundationVideoCapturer
 
 }  // namespace webrtc