Remove hardcoded kValueSizeBytes values from variable-length header extensions.

webrtc/modules/rtp_rtcp/source/rtp_header_extensions.h

 /*
  *  Copyright (c) 2016 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.
  */
 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSIONS_H_
@@ skipping 97 matching lines @@
       "http://www.webrtc.org/experiments/rtp-hdrext/video-content-type";
 
   static bool Parse(rtc::ArrayView<const uint8_t> data,
                     VideoContentType* content_type);
   static bool Write(uint8_t* data, VideoContentType content_type);
 };
 
 class RtpStreamId {
  public:
   static constexpr RTPExtensionType kId = kRtpExtensionRtpStreamId;
-  // TODO(danilchap): Implement write support of dynamic size extension that
-  // allows to remove the ValueSize constant.
-  static constexpr uint8_t kValueSizeBytes = 1;
   static constexpr const char* kUri =
       "urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id";
 
   static bool Parse(rtc::ArrayView<const uint8_t> data, StreamId* rid);
   static bool Parse(rtc::ArrayView<const uint8_t> data, std::string* rid);
 };
 
 class RepairedRtpStreamId {
  public:
   static constexpr RTPExtensionType kId = kRtpExtensionRepairedRtpStreamId;
-  // TODO(danilchap): Implement write support of dynamic size extension that
-  // allows to remove the ValueSize constant.
-  static constexpr uint8_t kValueSizeBytes = 1;
   static constexpr const char* kUri =
       "urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id";
 
   static bool Parse(rtc::ArrayView<const uint8_t> data, StreamId* rid);
   static bool Parse(rtc::ArrayView<const uint8_t> data, std::string* rid);
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_HEADER_EXTENSIONS_H_