Add QuicTransportChannel methods for QUIC streams

webrtc/p2p/quic/quictransportchannel.cc

Index: webrtc/p2p/quic/quictransportchannel.cc
diff --git a/webrtc/p2p/quic/quictransportchannel.cc b/webrtc/p2p/quic/quictransportchannel.cc
index cc0576ddb239a50bea2fbadc8cd541e3a6eb33aa..446fd4201cc8de964513b4435d7b0b4605c46f7a 100644
--- a/webrtc/p2p/quic/quictransportchannel.cc
+++ b/webrtc/p2p/quic/quictransportchannel.cc
@@ -443,6 +443,8 @@ bool QuicTransportChannel::CreateQuicSession() {
       this, &QuicTransportChannel::OnHandshakeComplete);
   quic_->SignalConnectionClosed.connect(
       this, &QuicTransportChannel::OnConnectionClosed);
+  quic_->SignalIncomingStream.connect(this,
+                                      &QuicTransportChannel::OnIncomingStream);
   return true;
 }
 
@@ -541,6 +543,7 @@ void QuicTransportChannel::OnConnectionClosed(net::QuicErrorCode error,
   // does not close due to failure.
   set_quic_state(QUIC_TRANSPORT_CLOSED);
   set_writable(false);
+  SignalClosed();
 }
 
 void QuicTransportChannel::OnProofValid(
@@ -569,4 +572,16 @@ void QuicTransportChannel::set_quic_state(QuicTransportState state) {
   quic_state_ = state;
 }
 
+ReliableQuicStream* QuicTransportChannel::CreateQuicStream() {
+  if (quic_) {
+    net::SpdyPriority priority = 0;  // Priority of the QUIC stream (not used)
+    return quic_->CreateOutgoingDynamicStream(priority);
+  }
+  return nullptr;
+}
+
+void QuicTransportChannel::OnIncomingStream(ReliableQuicStream* stream) {
+  SignalIncomingStream(stream);
+}
+
 }  // namespace cricket