Modify PeerConnection for end-to-end QuicDataChannel usage

webrtc/api/webrtcsession_unittest.cc

Index: webrtc/api/webrtcsession_unittest.cc
diff --git a/webrtc/api/webrtcsession_unittest.cc b/webrtc/api/webrtcsession_unittest.cc
index 18c1a95116e5e812c0f784137c5fb28a463e895c..ef3da37d05114ac12a301a29bfb58d94be247d7b 100644
--- a/webrtc/api/webrtcsession_unittest.cc
+++ b/webrtc/api/webrtcsession_unittest.cc
@@ -4275,6 +4275,32 @@ TEST_P(WebRtcSessionTest, TestRenegotiateNewMediaWithCandidatesSeparated) {
   SetLocalDescriptionWithoutError(answer);
 }
 
+#ifdef USE_QUIC
+// Test that when the local session description specifies QUIC and is an offer,
+// then QUIC is used.
+TEST_P(WebRtcSessionTest, TestUseQuicTransportWithLocalQuicOffer) {
+  InitWithDtls(GetParam());
+  SessionDescriptionInterface* offer = CreateOffer();
+  offer->description()->set_quic(true);
+  EXPECT_EQ(nullptr, session_->quic_transport_channel());
+  SetLocalDescriptionWithoutError(offer);
+  EXPECT_NE(nullptr, session_->quic_transport_channel());
+  EXPECT_EQ(cricket::DCT_QUIC, session_->data_channel_type());
+}
+
+// Test that when the remote session description specifies QUIC and is an offer,
+// then QUIC is used.
+TEST_P(WebRtcSessionTest, TestUseQuicTransportWithRemoteQuicOffer) {
+  InitWithDtls(GetParam());
+  SessionDescriptionInterface* offer = CreateOffer();
+  offer->description()->set_quic(true);
+  EXPECT_EQ(nullptr, session_->quic_transport_channel());
+  SetRemoteDescriptionWithoutError(offer);
+  EXPECT_NE(nullptr, session_->quic_transport_channel());
+  EXPECT_EQ(cricket::DCT_QUIC, session_->data_channel_type());
+}
+#endif  // USE_QUIC
+
 // Flaky on Win and Mac only. See webrtc:4943
 #if defined(WEBRTC_WIN) || defined(WEBRTC_MAC)
 #define MAYBE_TestRtxRemovedByCreateAnswer DISABLED_TestRtxRemovedByCreateAnswer