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 752b20f4b4f7d251be4f6c8dfb58e47434f29f5d..e59d15871880195ce4bd9e25e3749c3a6bf9b870 100644
--- a/webrtc/api/webrtcsession.h
+++ b/webrtc/api/webrtcsession.h
@@ -37,6 +37,10 @@ class StatsReport;
 class VideoChannel;
 class VoiceChannel;
 
+#ifdef HAVE_QUIC
+class QuicTransportChannel;
+#endif  // HAVE_QUIC
+
 }  // namespace cricket
 
 namespace webrtc {
@@ -330,6 +334,10 @@ 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
@@ -516,6 +524,10 @@ 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