Simplify QUIC's encryption path now that FEC is gone. Protected by FLAG_quic_inplace_encryption.

net/quic/quic_protocol.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/quic_protocol.h"
 
 #include "base/stl_util.h"
 #include "net/quic/quic_flags.h"
 #include "net/quic/quic_utils.h"
 
@@ skipping 17 matching lines @@
 size_t GetPacketHeaderSize(QuicConnectionIdLength connection_id_length,
                            bool include_version,
                            bool include_path_id,
                            QuicPacketNumberLength packet_number_length) {
   return kPublicFlagsSize + connection_id_length +
          (include_version ? kQuicVersionSize : 0) +
          (include_path_id ? kQuicPathIdSize : 0) + packet_number_length +
          kPrivateFlagsSize;
 }
 
+size_t GetStartOfEncryptedData(const QuicPacketHeader& header) {
+  return GetPacketHeaderSize(header) - kPrivateFlagsSize;
+}
+
 size_t GetStartOfEncryptedData(QuicConnectionIdLength connection_id_length,
                                bool include_version,
                                bool include_path_id,
                                QuicPacketNumberLength packet_number_length) {
   // Don't include the fec size, since encryption starts before private flags.
   return GetPacketHeaderSize(connection_id_length, include_version,
                              include_path_id, packet_number_length) -
          kPrivateFlagsSize;
 }
 
@@ skipping 738 matching lines @@
       is_fec_packet(is_fec_packet),
       has_crypto_handshake(has_crypto_handshake),
       needs_padding(needs_padding),
       retransmission(0) {}
 
 TransmissionInfo::TransmissionInfo(const TransmissionInfo& other) = default;
 
 TransmissionInfo::~TransmissionInfo() {}
 
 }  // namespace net