Revert of Modified PeerConnection and WebRtcSession for end-to-end QuicDataChannel usage.

webrtc/api/test/peerconnectiontestwrapper.h

 /*
  *  Copyright 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 14 matching lines @@
       public sigslot::has_slots<> {
  public:
   static void Connect(PeerConnectionTestWrapper* caller,
                       PeerConnectionTestWrapper* callee);
 
   PeerConnectionTestWrapper(const std::string& name,
                             rtc::Thread* network_thread,
                             rtc::Thread* worker_thread);
   virtual ~PeerConnectionTestWrapper();
 
-  bool CreatePc(
-      const webrtc::MediaConstraintsInterface* constraints,
-      const webrtc::PeerConnectionInterface::RTCConfiguration& config);
+  bool CreatePc(const webrtc::MediaConstraintsInterface* constraints);
 
   rtc::scoped_refptr<webrtc::DataChannelInterface> CreateDataChannel(
       const std::string& label,
       const webrtc::DataChannelInit& init);
 
   // Implements PeerConnectionObserver.
   virtual void OnSignalingChange(
      webrtc::PeerConnectionInterface::SignalingState new_state) {}
   virtual void OnStateChange(
       webrtc::PeerConnectionObserver::StateType state_changed) {}
@@ skipping 52 matching lines @@
   rtc::Thread* const network_thread_;
   rtc::Thread* const worker_thread_;
   rtc::scoped_refptr<webrtc::PeerConnectionInterface> peer_connection_;
   rtc::scoped_refptr<webrtc::PeerConnectionFactoryInterface>
       peer_connection_factory_;
   rtc::scoped_refptr<FakeAudioCaptureModule> fake_audio_capture_module_;
   std::unique_ptr<webrtc::FakeVideoTrackRenderer> renderer_;
 };
 
 #endif  // WEBRTC_API_TEST_PEERCONNECTIONTESTWRAPPER_H_