Add MakeUnique from chromium and change StunMessage::AddAttribute to take a unique_ptr.

webrtc/p2p/base/stunrequest.cc

 /*
  *  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.
  */
 
 #include "webrtc/p2p/base/stunrequest.h"
 
 #include <algorithm>
 #include <memory>
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/helpers.h"
 #include "webrtc/base/logging.h"
+#include "webrtc/base/ptr_util.h"
 #include "webrtc/base/stringencode.h"
 
 namespace cricket {
 
 const uint32_t MSG_STUN_SEND = 1;
 
 // RFC 5389 says SHOULD be 500ms.
 // For years, this was 100ms, but for networks that
 // experience moments of high RTT (such as 2G networks), this doesn't
 // work well.
@@ skipping 153 matching lines @@
   if (manager_) {
     manager_->Remove(this);
     manager_->thread_->Clear(this);
   }
   delete msg_;
 }
 
 void StunRequest::Construct() {
   if (msg_->type() == 0) {
     if (!origin_.empty()) {
-      msg_->AddAttribute(new StunByteStringAttribute(STUN_ATTR_ORIGIN,
-          origin_));
+      msg_->AddAttribute(
+          rtc::MakeUnique<StunByteStringAttribute>(STUN_ATTR_ORIGIN, origin_));
     }
     Prepare(msg_);
     RTC_DCHECK(msg_->type() != 0);
   }
 }
 
 int StunRequest::type() {
   RTC_DCHECK(msg_ != NULL);
   return msg_->type();
 }
@@ skipping 46 matching lines @@
 int StunRequest::resend_delay() {
   if (count_ == 0) {
     return 0;
   }
   int retransmissions = (count_ - 1);
   int rto = STUN_INITIAL_RTO << retransmissions;
   return std::min(rto, STUN_MAX_RTO);
 }
 
 }  // namespace cricket