Update I420Buffer to new VideoFrameBuffer interface

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

Index: webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.mm
diff --git a/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.mm b/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.mm
index 72117f5be6a5c7d2fe2a1fafb6f790eaf0f4ed14..1779732667746d03c41bf49b6853706876f999b7 100644
--- a/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.mm
+++ b/webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.mm
@@ -160,8 +160,7 @@ void AVFoundationVideoCapturer::CaptureSampleBuffer(
   // Applying rotation is only supported for legacy reasons and performance is
   // not critical here.
   if (apply_rotation() && rotation != kVideoRotation_0) {
-    buffer = I420Buffer::Rotate(*buffer->NativeToI420Buffer(),
-                                rotation);
+    buffer = I420Buffer::Rotate(*buffer->ToI420(), rotation);
     if (rotation == kVideoRotation_90 || rotation == kVideoRotation_270) {
       std::swap(captured_width, captured_height);
     }