Distinguish between SCT invalidity reasons in UMA

net/cert/multi_log_ct_verifier.cc

 // 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.
 
 #include "net/cert/multi_log_ct_verifier.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 181 matching lines @@
   if (it == logs_.end()) {
     DVLOG(1) << "SCT does not match any known log.";
     AddSCTAndLogStatus(sct, ct::SCT_STATUS_LOG_UNKNOWN, &(result->scts));
     return false;
   }
 
   sct->log_description = it->second->description();
 
   if (!it->second->Verify(expected_entry, *sct.get())) {
     DVLOG(1) << "Unable to verify SCT signature.";
-    AddSCTAndLogStatus(sct, ct::SCT_STATUS_INVALID, &(result->scts));
+    AddSCTAndLogStatus(sct, ct::SCT_STATUS_INVALID_SIGNATURE, &(result->scts));
     return false;
   }
 
   // SCT verified ok, just make sure the timestamp is legitimate.
   if (sct->timestamp > base::Time::Now()) {
     DVLOG(1) << "SCT is from the future!";
-    AddSCTAndLogStatus(sct, ct::SCT_STATUS_INVALID, &(result->scts));
+    AddSCTAndLogStatus(sct, ct::SCT_STATUS_INVALID_TIMESTAMP, &(result->scts));
     return false;
   }
 
   AddSCTAndLogStatus(sct, ct::SCT_STATUS_OK, &(result->scts));
   if (observer_)
     observer_->OnSCTVerified(cert, sct.get());
   return true;
 }
 
 } // namespace net