Refactoring that removes P2PTransport and DtlsTransport classes.

webrtc/p2p/quic/quictransport.h

Index: webrtc/p2p/quic/quictransport.h
diff --git a/webrtc/p2p/quic/quictransport.h b/webrtc/p2p/quic/quictransport.h
index 14bd13f3b2befff5b941c1de25dc4df533cc775a..1d2093709fb57cbb613aff38c5b2161bf2d33211 100644
--- a/webrtc/p2p/quic/quictransport.h
+++ b/webrtc/p2p/quic/quictransport.h
@@ -23,7 +23,11 @@ namespace cricket {
 class P2PTransportChannel;
 class PortAllocator;
 
-// TODO(mikescarlett): Refactor to avoid code duplication with DtlsTransport.
+// TODO(deadbeef): To get QUIC working with TransportController again, would
+// need to merge this class with Transport (or make separate DTLS/QUIC
+// subclasses). The only difference between the two (as of typing this) is that
+// the QUIC channel *requires* a fingerprint, whereas the DTLS channel can
+// operate in a passthrough mode when SDES is used.
 class QuicTransport : public Transport {
  public:
   QuicTransport(const std::string& name,