Memory copy the VideoFrame to match the requirement for HW encoders.

media/cast/sender/size_adaptable_video_encoder_base.cc

Index: media/cast/sender/size_adaptable_video_encoder_base.cc
diff --git a/media/cast/sender/size_adaptable_video_encoder_base.cc b/media/cast/sender/size_adaptable_video_encoder_base.cc
index 0a7c323244d7a7345a12b3434ddd7e602352172e..a803347f6dd9da24359fc0fc48f6d06690808f16 100644
--- a/media/cast/sender/size_adaptable_video_encoder_base.cc
+++ b/media/cast/sender/size_adaptable_video_encoder_base.cc
@@ -156,7 +156,9 @@ void SizeAdaptableVideoEncoderBase::OnEncodedVideoFrame(
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   --frames_in_encoder_;
   DCHECK_GE(frames_in_encoder_, 0);
-  next_frame_id_ = encoded_frame->frame_id + 1;
+
+  if (encoded_frame)
+    next_frame_id_ = encoded_frame->frame_id + 1;
   frame_encoded_callback.Run(std::move(encoded_frame));
 }