Modify PeerConnection for end-to-end QuicDataChannel usage

webrtc/p2p/base/faketransportcontroller.h

 /*
  *  Copyright 2009 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 355 matching lines @@
       SetChannelDestination(kv.first, kv.second);
     }
   }
 
   void SetWritable(bool writable) {
     for (const auto& kv : channels_) {
       kv.second->SetWritable(writable);
     }
   }
 
-  void SetLocalCertificate(
+  bool SetLocalCertificate(
       const rtc::scoped_refptr<rtc::RTCCertificate>& certificate) override {
     certificate_ = certificate;
+    return true;
   }
   bool GetLocalCertificate(
       rtc::scoped_refptr<rtc::RTCCertificate>* certificate) override {
     if (!certificate_)
       return false;
 
     *certificate = certificate_;
     return true;
   }
 
@@ skipping 172 matching lines @@
     }
   }
 
  private:
   bool fail_create_channel_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_FAKETRANSPORTCONTROLLER_H_