Add cropping to VIEEncoder to match simulcast streams resolution

webrtc/video/vie_encoder.h

Index: webrtc/video/vie_encoder.h
diff --git a/webrtc/video/vie_encoder.h b/webrtc/video/vie_encoder.h
index 77a6bc417db2c1a6a677e1824a6b0cdae3253ed4..91c6ca4f0129722f59c16f16fda7f234c23c7d13 100644
--- a/webrtc/video/vie_encoder.h
+++ b/webrtc/video/vie_encoder.h
@@ -257,6 +257,8 @@ class ViEEncoder : public rtc::VideoSinkInterface<VideoFrame>,
   // encoder on the next frame.
   bool pending_encoder_reconfiguration_ ACCESS_ON(&encoder_queue_);
   rtc::Optional<VideoFrameInfo> last_frame_info_ ACCESS_ON(&encoder_queue_);
+  int crop_width_ ACCESS_ON(&encoder_queue_);
+  int crop_height_ ACCESS_ON(&encoder_queue_);
   uint32_t encoder_start_bitrate_bps_ ACCESS_ON(&encoder_queue_);
   size_t max_data_payload_length_ ACCESS_ON(&encoder_queue_);
   bool nack_enabled_ ACCESS_ON(&encoder_queue_);