Replace QuicEncryptedPacket's fields with equivalents in SerializedPacket.

net/quic/quic_connection.h

Index: net/quic/quic_connection.h
diff --git a/net/quic/quic_connection.h b/net/quic/quic_connection.h
index b3fcdf6b7c61d33c6fa859f50cad63155910aba6..9935e27d51c25fe8e11347dc38e54b0d2361d9c6 100644
--- a/net/quic/quic_connection.h
+++ b/net/quic/quic_connection.h
@@ -712,10 +712,6 @@ class NET_EXPORT_PRIVATE QuicConnection
   // writer is write blocked.
   bool WritePacket(SerializedPacket* packet);
 
-  // Does the main work of WritePacket, but does not delete the packet or
-  // retransmittable frames upon success.
-  bool WritePacketInner(SerializedPacket* packet);
-
   // Make sure an ack we got from our peer is sane.
   // Returns nullptr for valid acks or an error std::string if it was invalid.
   const char* ValidateAckFrame(const QuicAckFrame& incoming_ack);
@@ -882,8 +878,10 @@ class NET_EXPORT_PRIVATE QuicConnection
   bool pending_version_negotiation_packet_;
 
   // When packets could not be sent because the socket was not writable,
-  // they are added to this list.  All corresponding frames are in
-  // unacked_packets_ if they are to be retransmitted.
+  // they are added to this std::list.  All corresponding frames are in
+  // unacked_packets_ if they are to be retransmitted.  Packets encrypted_buffer
+  // fields are owned by the QueuedPacketList, in order to ensure they outlast
+  // the original scope of the SerializedPacket.
   QueuedPacketList queued_packets_;
 
   // If true, then crypto packets will be saved as termination packets.