Replace scoped_ptr with unique_ptr in webrtc/base/

webrtc/p2p/base/p2ptransportchannel.h

 /*
  *  Copyright 2004 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 126 matching lines @@
   bool GetSrtpCryptoSuite(int* cipher) override { return false; }
 
   // Find out which DTLS cipher was negotiated.
   bool GetSslCipherSuite(int* cipher) override { return false; }
 
   // Returns null because the channel is not encrypted by default.
   rtc::scoped_refptr<rtc::RTCCertificate> GetLocalCertificate() const override {
     return nullptr;
   }
 
-  rtc::scoped_ptr<rtc::SSLCertificate> GetRemoteSSLCertificate()
+  std::unique_ptr<rtc::SSLCertificate> GetRemoteSSLCertificate()
       const override {
     return nullptr;
   }
 
   // Allows key material to be extracted for external encryption.
   bool ExportKeyingMaterial(const std::string& label,
                             const uint8_t* context,
                             size_t context_len,
                             bool use_context,
                             uint8_t* result,
@@ skipping 170 matching lines @@
   TransportChannelState state_ = TransportChannelState::STATE_INIT;
   IceConfig config_;
   int last_sent_packet_id_ = -1;  // -1 indicates no packet was sent before.
 
   RTC_DISALLOW_COPY_AND_ASSIGN(P2PTransportChannel);
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_P2PTRANSPORTCHANNEL_H_