gfe-relnote: Use encryption level instead of looking for the string "CHLO" to identify the QUIC ClientHello.  Client side change only, not flag protected.

PiperOrigin-RevId: 241995962
Change-Id: I840eb7531ef55f32c7bb06bc08bcdb947459e732
diff --git a/quic/core/quic_packet_generator.cc b/quic/core/quic_packet_generator.cc
index 257ca9b..8267ade 100644
--- a/quic/core/quic_packet_generator.cc
+++ b/quic/core/quic_packet_generator.cc
@@ -148,7 +148,7 @@
     bool needs_full_padding =
         has_handshake && fully_pad_crypto_handshake_packets_;
 
-    if (!packet_creator_.ConsumeData(id, write_length, total_bytes_consumed,
+    if (!packet_creator_.ConsumeData(id, write_length - total_bytes_consumed,
                                      offset + total_bytes_consumed, fin,
                                      needs_full_padding,
                                      next_transmission_type_, &frame)) {