Replace use of logging::DEBUG_MODE with DCHECK_IS_ON().

crypto/openssl_util.cc

Index: crypto/openssl_util.cc
diff --git a/crypto/openssl_util.cc b/crypto/openssl_util.cc
index 0d044c76d4f5460f7209e07a6abb98ba5a99400b..65be615a50519dbaf317746bc76a2faa1110cb5b 100644
--- a/crypto/openssl_util.cc
+++ b/crypto/openssl_util.cc
@@ -40,7 +40,7 @@ void EnsureOpenSSLInit() {
 }
 
 void ClearOpenSSLERRStack(const tracked_objects::Location& location) {
-  if (logging::DEBUG_MODE && VLOG_IS_ON(1)) {
+  if (DCHECK_IS_ON() && VLOG_IS_ON(1)) {
     uint32_t error_num = ERR_peek_error();
     if (error_num == 0)
       return;