In QUIC version >= 38, enables random padding of size [1, 256]

net/quic/core/quic_session.cc

Index: net/quic/core/quic_session.cc
diff --git a/net/quic/core/quic_session.cc b/net/quic/core/quic_session.cc
index 28d256bc30b77480fbf4f390702de54164f21dab..31e9ea82fc3c55e2c06f7ca32e3e389e8264ccb5 100644
--- a/net/quic/core/quic_session.cc
+++ b/net/quic/core/quic_session.cc
@@ -288,7 +288,7 @@ QuicConsumedData QuicSession::WritevData(
     QuicStreamId id,
     QuicIOVector iov,
     QuicStreamOffset offset,
-    bool fin,
+    StreamSendingState state,
     QuicReferenceCountedPointer<QuicAckListenerInterface> ack_listener) {
   // This check is an attempt to deal with potential memory corruption
   // in which |id| ends up set to 1 (the crypto stream id). If this happen
@@ -308,7 +308,7 @@ QuicConsumedData QuicSession::WritevData(
     // up write blocked until OnCanWrite is next called.
     return QuicConsumedData(0, false);
   }
-  QuicConsumedData data = connection_->SendStreamData(id, iov, offset, fin,
+  QuicConsumedData data = connection_->SendStreamData(id, iov, offset, state,
                                                       std::move(ack_listener));
   write_blocked_streams_.UpdateBytesForStream(id, data.bytes_consumed);
   return data;