Add a PacketOptions struct to webrtc::Transport.

webrtc/test/rtp_rtcp_observer.h

Index: webrtc/test/rtp_rtcp_observer.h
diff --git a/webrtc/test/rtp_rtcp_observer.h b/webrtc/test/rtp_rtcp_observer.h
index 24f72565f17dab8353f0f8e1023b916e8643362f..97aa7b689e914335ffa22d95fd44e7b1cda9a802 100644
--- a/webrtc/test/rtp_rtcp_observer.h
+++ b/webrtc/test/rtp_rtcp_observer.h
@@ -126,7 +126,9 @@ class RtpRtcpObserver {
           on_rtcp_(on_rtcp) {}
 
   private:
-   bool SendRtp(const uint8_t* packet, size_t length) override {
+   bool SendRtp(const uint8_t* packet,
+                size_t length,
+                const PacketOptions& options) override {
       EXPECT_FALSE(RtpHeaderParser::IsRtcp(packet, length));
       Action action;
       {
@@ -138,7 +140,7 @@ class RtpRtcpObserver {
           // Drop packet silently.
           return true;
         case SEND_PACKET:
-          return test::DirectTransport::SendRtp(packet, length);
+          return test::DirectTransport::SendRtp(packet, length, options);
       }
       return true;  // Will never happen, makes compiler happy.
     }