Revert of Modify PeerConnection for end-to-end QuicDataChannel usage

webrtc/p2p/quic/quictransportchannel_unittest.cc

Index: webrtc/p2p/quic/quictransportchannel_unittest.cc
diff --git a/webrtc/p2p/quic/quictransportchannel_unittest.cc b/webrtc/p2p/quic/quictransportchannel_unittest.cc
index 49ca29cd149d774123dee242af7bef9b02b1d7cd..0e16390a89b971db5dafbccdcc552982bffb5b0a 100644
--- a/webrtc/p2p/quic/quictransportchannel_unittest.cc
+++ b/webrtc/p2p/quic/quictransportchannel_unittest.cc
@@ -112,6 +112,8 @@
 
   // Connects |ice_channel_| to that of the other peer.
   void Connect(QuicTestPeer* other_peer) {
+    ice_channel_->Connect();
+    other_peer->ice_channel_->Connect();
     ice_channel_->SetDestination(other_peer->ice_channel_);
   }
 
@@ -417,6 +419,8 @@
 // Test that QuicTransportChannel::WritePacket blocks when the ICE
 // channel is not writable, and otherwise succeeds.
 TEST_F(QuicTransportChannelTest, QuicWritePacket) {
+  peer1_.ice_channel()->Connect();
+  peer2_.ice_channel()->Connect();
   peer1_.ice_channel()->SetDestination(peer2_.ice_channel());
   std::string packet = "FAKEQUICPACKET";