Stop using some scoped_ptr features that unique_ptr doesn't have

webrtc/p2p/base/dtlstransportchannel.cc

 /*
  *  Copyright 2011 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 216 matching lines @@
   // fingerprint.
   if (!dtls_active_) {
     LOG_J(LS_ERROR, this) << "Can't set DTLS remote settings in this state.";
     return false;
   }
 
   // At this point we know we are doing DTLS
   remote_fingerprint_value_ = std::move(remote_fingerprint_value);
   remote_fingerprint_algorithm_ = digest_alg;
 
-  bool reconnect = dtls_;
+  bool reconnect = (dtls_ != nullptr);
 
   if (!SetupDtls()) {
     set_dtls_state(DTLS_TRANSPORT_FAILED);
     return false;
   }
 
   if (reconnect) {
     Reconnect();
   }
 
@@ skipping 394 matching lines @@
 
 void DtlsTransportChannelWrapper::Reconnect() {
   set_dtls_state(DTLS_TRANSPORT_NEW);
   set_writable(false);
   if (channel_->writable()) {
     OnWritableState(channel_);
   }
 }
 
 }  // namespace cricket