Remove manual CRYPTO_add calls.

net/cert/x509_certificate_openssl.cc

Index: net/cert/x509_certificate_openssl.cc
diff --git a/net/cert/x509_certificate_openssl.cc b/net/cert/x509_certificate_openssl.cc
index 504f3aea5f33fe2b0a98ee510e2b6feaf364a365..fdd0e48d8551eef12623ea3e7d3b397d039147de 100644
--- a/net/cert/x509_certificate_openssl.cc
+++ b/net/cert/x509_certificate_openssl.cc
@@ -241,13 +241,7 @@ void sk_X509_NAME_free_all(STACK_OF(X509_NAME)* sk) {
 X509Certificate::OSCertHandle X509Certificate::DupOSCertHandle(
     OSCertHandle cert_handle) {
   DCHECK(cert_handle);
-  // Using X509_dup causes the entire certificate to be reparsed. This
-  // conversion, besides being non-trivial, drops any associated
-  // application-specific data set by X509_set_ex_data. Using CRYPTO_add
-  // just bumps up the ref-count for the cert, without causing any allocations
-  // or deallocations.
-  CRYPTO_add(&cert_handle->references, 1, CRYPTO_LOCK_X509);
-  return cert_handle;
+  return X509_up_ref(cert_handle);
 }
 
 // static