Modify PeerConnection for end-to-end QuicDataChannel usage

webrtc/p2p/base/transportcontroller.h

Index: webrtc/p2p/base/transportcontroller.h
diff --git a/webrtc/p2p/base/transportcontroller.h b/webrtc/p2p/base/transportcontroller.h
index 9d06823920f668d32796eba90e44394c15f16ebe..8aec9730c2f2eacc7f4b3976a21ad9d6b1338816 100644
--- a/webrtc/p2p/base/transportcontroller.h
+++ b/webrtc/p2p/base/transportcontroller.h
@@ -89,6 +89,11 @@ class TransportController : public sigslot::has_slots<>,
   // nothing is referencing it.
   virtual void DestroyTransportChannel_w(const std::string& transport_name,
                                          int component);
+#ifdef HAVE_QUIC
+  // Activates QUIC usage.
+  void use_quic() { quic_ = true; }
+  bool quic() const { return quic_; }
+#endif  // HAVE_QUIC
 
   // All of these signals are fired on the signalling thread.
 
@@ -221,6 +226,11 @@ class TransportController : public sigslot::has_slots<>,
   uint64_t ice_tiebreaker_ = rtc::CreateRandomId64();
   rtc::scoped_refptr<rtc::RTCCertificate> certificate_;
   rtc::AsyncInvoker invoker_;
+
+#ifdef HAVE_QUIC
+  // True if QUIC is used instead of DTLS.
+  bool quic_ = false;
+#endif  // HAVE_QUIC
 };
 
 }  // namespace cricket