Replace scoped_ptr with unique_ptr in webrtc/base/

webrtc/base/rtccertificate.cc

 /*
  *  Copyright 2015 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.
  */
 
+#include <memory>
+
 #include "webrtc/base/rtccertificate.h"
 
 #include "webrtc/base/checks.h"
 
 namespace rtc {
 
 scoped_refptr<RTCCertificate> RTCCertificate::Create(
-    scoped_ptr<SSLIdentity> identity) {
+    std::unique_ptr<SSLIdentity> identity) {
   return new RefCountedObject<RTCCertificate>(identity.release());
 }
 
 RTCCertificate::RTCCertificate(SSLIdentity* identity)
     : identity_(identity) {
   RTC_DCHECK(identity_);
 }
 
 RTCCertificate::~RTCCertificate() {
 }
 
 uint64_t RTCCertificate::Expires() const {
   int64_t expires = ssl_certificate().CertificateExpirationTime();
   if (expires != -1)
     return static_cast<uint64_t>(expires) * kNumMillisecsPerSec;
   // If the expiration time could not be retrieved return an expired timestamp.
   return 0;  // = 1970-01-01
 }
 
 bool RTCCertificate::HasExpired(uint64_t now) const {
   return Expires() <= now;
 }
 
 const SSLCertificate& RTCCertificate::ssl_certificate() const {
   return identity_->certificate();
 }
 
 }  // namespace rtc