Adds QUIC_VERSION_36 which adds support to force HOL blocking between streams for measurement purpo…

net/quic/reliable_quic_stream.h

Index: net/quic/reliable_quic_stream.h
diff --git a/net/quic/reliable_quic_stream.h b/net/quic/reliable_quic_stream.h
index da320363d3620408d7d60ad4b6db821b7e96c2b3..67bc4b8bc09e07e5d699fe31b67577949424dfd0 100644
--- a/net/quic/reliable_quic_stream.h
+++ b/net/quic/reliable_quic_stream.h
@@ -191,6 +191,14 @@ class NET_EXPORT_PRIVATE ReliableQuicStream {
                               bool fin,
                               QuicAckListenerInterface* ack_listener);
 
+  // Allows override of the session level writev, for the force HOL
+  // blocking experiment.
+  virtual QuicConsumedData WritevDataInner(
+      QuicIOVector iov,
+      QuicStreamOffset offset,
+      bool fin,
+      QuicAckListenerInterface* ack_notifier_delegate);
+
   // Close the write side of the socket.  Further writes will fail.
   // Can be called by the subclass or internally.
   // Does not send a FIN.  May cause the stream to be closed.