Add a PacketOptions struct to webrtc::Transport.

talk/media/webrtc/webrtcvoiceengine.h

Index: talk/media/webrtc/webrtcvoiceengine.h
diff --git a/talk/media/webrtc/webrtcvoiceengine.h b/talk/media/webrtc/webrtcvoiceengine.h
index 7950024712b1ce35aeed67ab4306360f1be06424..69e88e44c472a0d49f9f6088ba3f581242d39328 100644
--- a/talk/media/webrtc/webrtcvoiceengine.h
+++ b/talk/media/webrtc/webrtcvoiceengine.h
@@ -223,7 +223,9 @@ class WebRtcVoiceMediaChannel : public VoiceMediaChannel,
   bool GetStats(VoiceMediaInfo* info) override;
 
   // implements Transport interface
-  bool SendRtp(const uint8_t* data, size_t len) override {
+  bool SendRtp(const uint8_t* data,
+               size_t len,
+               const webrtc::PacketOptions& options) override {
     rtc::Buffer packet(reinterpret_cast<const uint8_t*>(data), len,
                        kMaxRtpPacketLen);
     return VoiceMediaChannel::SendPacket(&packet);