Certificate Transparency: Correctly handle SCT origin

net/cert/signed_certificate_timestamp.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_CERT_SIGNED_CERTIFICATE_TIMESTAMP_H_
 #define NET_CERT_SIGNED_CERTIFICATE_TIMESTAMP_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 96 matching lines @@
 
   void Persist(Pickle* pickle);
   static scoped_refptr<SignedCertificateTimestamp> CreateFromPickle(
       PickleIterator* iter);
 
   Version version;
   std::string log_id;
   base::Time timestamp;
   std::string extensions;
   DigitallySigned signature;
-  // The origin should not participate in equality checks
-  // as the same SCT can be provided from multiple sources.
   Origin origin;
   // The log description is not one of the SCT fields, but a user-readable
   // name defined alongside the log key. It should not participate
   // in equality checks as the log's description could change while
   // the SCT would be the same.
   std::string log_description;
 
  private:
   friend class base::RefCountedThreadSafe<SignedCertificateTimestamp>;
 
   ~SignedCertificateTimestamp();
 
   DISALLOW_COPY_AND_ASSIGN(SignedCertificateTimestamp);
 };
 
 }  // namespace ct
 
 }  // namespace net
 
 #endif  // NET_CERT_SIGNED_CERTIFICATE_TIMESTAMP_H_