Update from https://crrev.com/316786

net/quic/quic_stream_sequencer.h

Index: net/quic/quic_stream_sequencer.h
diff --git a/net/quic/quic_stream_sequencer.h b/net/quic/quic_stream_sequencer.h
index f34d73509e4ab19fef0520d689cf9c900d10d6b9..3570d3b86cc1a1fcc3aad61e10bd185c7a8f1163 100644
--- a/net/quic/quic_stream_sequencer.h
+++ b/net/quic/quic_stream_sequencer.h
@@ -75,6 +75,8 @@ class NET_EXPORT_PRIVATE QuicStreamSequencer {
     return num_duplicate_frames_received_;
   }
 
+  int num_early_frames_received() const { return num_early_frames_received_; }
+
  private:
   friend class test::QuicStreamSequencerPeer;
 
@@ -122,6 +124,10 @@ class NET_EXPORT_PRIVATE QuicStreamSequencer {
   // Count of the number of duplicate frames received.
   int num_duplicate_frames_received_;
 
+  // Count of the number of frames received before all previous frames were
+  // received.
+  int num_early_frames_received_;
+
   DISALLOW_COPY_AND_ASSIGN(QuicStreamSequencer);
 };