Part of QUIC v39 change: 1) do not ack acks. 2) Send a WINDOW_UPDATE frame every 20 packets which d…

net/quic/core/quic_session.h

Index: net/quic/core/quic_session.h
diff --git a/net/quic/core/quic_session.h b/net/quic/core/quic_session.h
index 7ed5627ba0f40f63ea25743bdcdd03d8534d8831..32f19589f65ae1832f480ab43c22c3abfd7270e6 100644
--- a/net/quic/core/quic_session.h
+++ b/net/quic/core/quic_session.h
@@ -100,6 +100,8 @@ class QUIC_EXPORT_PRIVATE QuicSession : public QuicConnectionVisitorInterface {
   // Deletes streams that are safe to be deleted now that it's safe to do so (no
   // other operations are being done on the streams at this time).
   void PostProcessAfterData() override;
+  // Adds a connection level WINDOW_UPDATE frame.
+  void OnAckNeedsRetransmittableFrame() override;
   bool WillingAndAbleToWrite() const override;
   bool HasPendingHandshake() const override;
   bool HasOpenDynamicStreams() const override;