Modify PeerConnection for end-to-end QuicDataChannel usage

webrtc/api/webrtcsession.h

Index: webrtc/api/webrtcsession.h
diff --git a/webrtc/api/webrtcsession.h b/webrtc/api/webrtcsession.h
index 970f967cb8da595197389321cff79269c8577352..d9f99f5c63dede2fe0e2d8e5dfe64bc5c8700e4b 100644
--- a/webrtc/api/webrtcsession.h
+++ b/webrtc/api/webrtcsession.h
@@ -39,6 +39,10 @@ class StatsReport;
 class VideoChannel;
 class VoiceChannel;
 
+#ifdef HAVE_QUIC
+class QuicTransportChannel;
+#endif  // HAVE_QUIC
+
 }  // namespace cricket
 
 namespace webrtc {
@@ -332,6 +336,10 @@ class WebRtcSession : public AudioProviderInterface,
   // std::string represents the data channel label.
   sigslot::signal2<const std::string&, const InternalDataChannelInit&>
       SignalDataChannelOpenMessage;
+#ifdef HAVE_QUIC
+  sigslot::signal1<cricket::QuicTransportChannel*>
+      SignalQuicTransportChannelCreated;
+#endif  // HAVE_QUIC
 
  private:
   // Indicates the type of SessionDescription in a call to SetLocalDescription
@@ -517,6 +525,10 @@ class WebRtcSession : public AudioProviderInterface,
   // Declares the RTCP mux policy for the WebRTCSession.
   PeerConnectionInterface::RtcpMuxPolicy rtcp_mux_policy_;
 
+#ifdef HAVE_QUIC
+  cricket::QuicTransportChannel* quic_transport_channel_ = nullptr;
+#endif  // HAVE_QUIC
+
   RTC_DISALLOW_COPY_AND_ASSIGN(WebRtcSession);
 };
 }  // namespace webrtc