Remove hardcoded kValueSizeBytes values from variable-length header extensions.

webrtc/modules/rtp_rtcp/include/rtp_rtcp.h

Index: webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
diff --git a/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h b/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
index 10c947bd845a1080e58f8a52c0b2bcdb17045d45..6fc6b862b85e8d91aa0d9453e678688bf4fb36a2 100644
--- a/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
+++ b/webrtc/modules/rtp_rtcp/include/rtp_rtcp.h
@@ -125,11 +125,6 @@ class RtpRtcp : public Module {
   // Sets the maximum size of an RTP packet, including RTP headers.
   virtual void SetMaxRtpPacketSize(size_t size) = 0;
 
-  // Returns max payload length.
-  // Does not account for RTP headers and FEC/ULP/RED overhead (when FEC is
-  // enabled).
-  virtual size_t MaxPayloadSize() const = 0;

[brandtr, 2017/05/10 11:12:37]

I find the different "payload size"/MTU methods in the RTP module to be
confusing, so it's good to see that they are getting fewer :)

-
   // Returns max RTP packet size. Takes into account RTP headers and
   // FEC/ULP/RED overhead (when FEC is enabled).
   virtual size_t MaxRtpPacketSize() const = 0;