Remove hardcoded kValueSizeBytes values from variable-length header extensions.

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
index d6c54d033cd5d506fb4b34f8cf3bbcd4e1995b34..b24524c4af38e3191e31176e8cc929328840c095 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
@@ -417,8 +417,9 @@ size_t ModuleRtpRtcpImpl::TimeToSendPadding(
   return rtp_sender_->TimeToSendPadding(bytes, pacing_info);
 }
 
-size_t ModuleRtpRtcpImpl::MaxPayloadSize() const {
-  return rtp_sender_->MaxPayloadSize();
+size_t ModuleRtpRtcpImpl::MaxPayloadSize(
+    rtc::ArrayView<const RtpExtensionSize> extension_sizes) const {
+  return rtp_sender_->MaxPayloadSize(extension_sizes);
 }
 
 size_t ModuleRtpRtcpImpl::MaxRtpPacketSize() const {