Nuke WebPassOwnPtr<T> and replace it with std::unique_ptr<T>.

third_party/WebKit/Source/modules/mediastream/RTCCertificate.cpp

 /*
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "modules/mediastream/RTCCertificate.h"
 
 namespace blink {
 
-RTCCertificate::RTCCertificate(WebPassOwnPtr<WebRTCCertificate> certificate)
-    : m_certificate(certificate.release())
+RTCCertificate::RTCCertificate(std::unique_ptr<WebRTCCertificate> certificate)
+    : m_certificate(adoptPtr(certificate.release()))
 {
 }
 
-WebPassOwnPtr<WebRTCCertificate> RTCCertificate::certificateShallowCopy() const
+std::unique_ptr<WebRTCCertificate> RTCCertificate::certificateShallowCopy() const
 {
     return m_certificate->shallowCopy();
 }
 
 DOMTimeStamp RTCCertificate::expires() const
 {
     return static_cast<DOMTimeStamp>(m_certificate->expires());
 }
 
 } // namespace blink