Remove hardcoded kValueSizeBytes values from variable-length header extensions.

webrtc/modules/rtp_rtcp/source/rtp_sender_video.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 231 matching lines @@
 
 void RTPSenderVideo::GetUlpfecConfig(int* red_payload_type,
                                      int* ulpfec_payload_type) const {
   rtc::CritScope cs(&crit_);
   *red_payload_type = red_payload_type_;
   *ulpfec_payload_type = ulpfec_payload_type_;
 }
 
 size_t RTPSenderVideo::CalculateFecPacketOverhead() const {
   if (flexfec_enabled())
-    return flexfec_sender_->MaxPacketOverhead();
+    return flexfec_sender_->MaxPacketOverhead(RTPSender::FecExtensionSizes());
 
   size_t overhead = 0;
   if (red_enabled()) {
     // The RED overhead is due to a small header.
     overhead += kRedForFecHeaderLength;
   }
   if (ulpfec_enabled()) {
     // For ULPFEC, the overhead is the FEC headers plus RED for FEC header
     // (see above) plus anything in RTP header beyond the 12 bytes base header
     // (CSRC list, extensions...)
@@ skipping 160 matching lines @@
   rtc::CritScope cs(&crit_);
   return retransmission_settings_;
 }
 
 void RTPSenderVideo::SetSelectiveRetransmissions(uint8_t settings) {
   rtc::CritScope cs(&crit_);
   retransmission_settings_ = settings;
 }
 
 }  // namespace webrtc