Revert of Make the new jitter buffer the default jitter buffer.

webrtc/video/video_receive_stream.h

Index: webrtc/video/video_receive_stream.h
diff --git a/webrtc/video/video_receive_stream.h b/webrtc/video/video_receive_stream.h
index 3c5a653c5ae8c3dfb98d32e3b3813759ae54b95e..ab9fe4ea7bb5f6fb23bdcd6cb118c497e2518c75 100644
--- a/webrtc/video/video_receive_stream.h
+++ b/webrtc/video/video_receive_stream.h
@@ -130,6 +130,7 @@
   std::unique_ptr<IvfFileWriter> ivf_writer_ GUARDED_BY(ivf_writer_lock_);
 
   // Members for the new jitter buffer experiment.
+  const bool jitter_buffer_experiment_;
   std::unique_ptr<VCMJitterEstimator> jitter_estimator_;
   std::unique_ptr<video_coding::FrameBuffer> frame_buffer_;
 };