Update from https://crrev.com/312398

net/quic/quic_session.h

Index: net/quic/quic_session.h
diff --git a/net/quic/quic_session.h b/net/quic/quic_session.h
index 34fa2f4e552443b967e32508bc78422bcc98ea64..0d20b9b28157e3b94eb3a4bb25d52902d04065ed 100644
--- a/net/quic/quic_session.h
+++ b/net/quic/quic_session.h
@@ -68,7 +68,7 @@ class NET_EXPORT_PRIVATE QuicSession : public QuicConnectionVisitorInterface {
   void OnBlockedFrames(const std::vector<QuicBlockedFrame>& frames) override;
   void OnConnectionClosed(QuicErrorCode error, bool from_peer) override;
   void OnWriteBlocked() override {}
-  void OnSuccessfulVersionNegotiation(const QuicVersion& version) override {}
+  void OnSuccessfulVersionNegotiation(const QuicVersion& version) override;
   void OnCanWrite() override;
   void OnCongestionWindowChange(QuicTime now) override {}
   bool WillingAndAbleToWrite() const override;
@@ -116,6 +116,7 @@ class NET_EXPORT_PRIVATE QuicSession : public QuicConnectionVisitorInterface {
       QuicStreamId id,
       const SpdyHeaderBlock& headers,
       bool fin,
+      QuicPriority priority,
       QuicAckNotifier::DelegateInterface* ack_notifier_delegate);
 
   // Called by streams when they want to close the stream in both directions.