Revert "Remove OwnPtr from Blink."

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

 /*
  * 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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef RTCCertificate_h
 #define RTCCertificate_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/DOMTimeStamp.h"
 #include "platform/heap/GarbageCollected.h"
 #include "public/platform/WebRTCCertificate.h"
+#include "wtf/OwnPtr.h"
+
 #include <memory>
 
 namespace blink {
 
 class RTCCertificate final : public GarbageCollectedFinalized<RTCCertificate>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     // Takes ownership of the certificate.
     RTCCertificate(std::unique_ptr<WebRTCCertificate>);
 
     // Returns a new WebRTCCertificate shallow copy.
     std::unique_ptr<WebRTCCertificate> certificateShallowCopy() const;
     const WebRTCCertificate& certificate() const { return *m_certificate; }
 
     DEFINE_INLINE_TRACE() {}
 
     // Returns the expiration time in ms relative to epoch, 1970-01-01T00:00:00Z.
     DOMTimeStamp expires() const;
 
 private:
-    std::unique_ptr<WebRTCCertificate> m_certificate;
+    OwnPtr<WebRTCCertificate> m_certificate;
 };
 
 } // namespace blink
 
 #endif // RTCCertificate_h