Add a histogram for measuring the number of times we fall back to common name matching, when a cert…

net/cert/cert_verify_proc_nss.cc

Index: net/cert/cert_verify_proc_nss.cc
diff --git a/net/cert/cert_verify_proc_nss.cc b/net/cert/cert_verify_proc_nss.cc
index 0a0743c150d7a5487a6758d423093bf1f21008c2..c1df249bbd082c8e084a8e21c99319b7b5f610f0 100644
--- a/net/cert/cert_verify_proc_nss.cc
+++ b/net/cert/cert_verify_proc_nss.cc
@@ -764,8 +764,10 @@ int CertVerifyProcNSS::VerifyInternal(
 #endif  // defined(OS_IOS)
 
   // Make sure that the hostname matches with the common name of the cert.

[wtc, 2013/10/23 22:39:26]

This comment should be updated or removed.

-  if (!cert->VerifyNameMatch(hostname))
+  if (!cert->VerifyNameMatch(hostname,
+                             &verify_result->common_name_fallback_used)) {
     verify_result->cert_status |= CERT_STATUS_COMMON_NAME_INVALID;
+  }
 
   // Make sure that the cert is valid now.
   SECCertTimeValidity validity = CERT_CheckCertValidTimes(