Update from https://crrev.com/304418

net/quic/quic_packet_creator.h

Index: net/quic/quic_packet_creator.h
diff --git a/net/quic/quic_packet_creator.h b/net/quic/quic_packet_creator.h
index 287cde13415ed80df5f7ed365da76b64bfff60ec..bada2c3e9ae0387a4c1ddb96c35a38f2d6211bfc 100644
--- a/net/quic/quic_packet_creator.h
+++ b/net/quic/quic_packet_creator.h
@@ -212,11 +212,11 @@ class NET_EXPORT_PRIVATE QuicPacketCreator : public QuicFecBuilderInterface {
     next_sequence_number_length_ = length;
   }
 
-  size_t max_packet_length() const {
+  QuicByteCount max_packet_length() const {
     return max_packet_length_;
   }
 
-  void set_max_packet_length(size_t length) {
+  void set_max_packet_length(QuicByteCount length) {
     // |max_packet_length_| should not be changed mid-packet or mid-FEC group.
     DCHECK(fec_group_.get() == nullptr && queued_frames_.empty());
     max_packet_length_ = length;
@@ -272,7 +272,7 @@ class NET_EXPORT_PRIVATE QuicPacketCreator : public QuicFecBuilderInterface {
   // packet.
   bool send_version_in_packet_;
   // Maximum length including headers and encryption (UDP payload length.)
-  size_t max_packet_length_;
+  QuicByteCount max_packet_length_;
   // 0 indicates FEC is disabled.
   size_t max_packets_per_fec_group_;
   // Length of connection_id to send over the wire.