Add a PacketOptions struct to webrtc::Transport.

webrtc/test/null_transport.cc

 /*
  *  Copyright (c) 2013 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.
  */
 #include "webrtc/test/null_transport.h"
 
 namespace webrtc {
 namespace test {
 
-bool NullTransport::SendRtp(const uint8_t* packet, size_t length) {
+bool NullTransport::SendRtp(const uint8_t* packet,
+                            size_t length,
+                            const PacketOptions& options) {
   return true;
 }
 
 bool NullTransport::SendRtcp(const uint8_t* packet, size_t length) {
   return true;
 }
 
 }  // namespace test
 }  // namespace webrtc