message: Use NetworkToHost32 instead of HostToNetwork32 to translate PPID.
  Note that this wasn't actually making a difference since both do the
  same thing effectively.
  Cr-Commit-Position: refs/heads/master@{#30665}
diff: @@ -317,7 +317,7 @@ class SctpTransport::UsrSctpWrapper {
  // memory cleanup. But this does simplify code.
  const PayloadProtocolIdentifier ppid =
  static_cast<PayloadProtocolIdentifier>(
  - rtc::HostToNetwork32(rcv.rcv_ppid));
  + rtc::NetworkToHost32(rcv.rcv_ppid));
  DataMessageType type = DMT_NONE;
  if (!GetDataMediaType(ppid, &type) && !(flags & MSG_NOTIFICATION)) {
  // It's neither a notification nor a recognized data packet. Drop it.
  