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 5266f55550cfe0537eb9dc88210168a935da5fd4..f25d371012aba9790f40db4a3f77e43389210b63 100644
--- a/talk/media/webrtc/webrtcvoiceengine.h
+++ b/talk/media/webrtc/webrtcvoiceengine.h
@@ -250,7 +250,9 @@ class WebRtcVoiceMediaChannel : public VoiceMediaChannel,
                          VoiceMediaChannel::Error* error) 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);