Fix webui cert viewer showing wrong cert chain on NSS and no chain on OpenSSL.

chrome/browser/ui/webui/options/certificate_manager_handler.cc

Index: chrome/browser/ui/webui/options/certificate_manager_handler.cc
diff --git a/chrome/browser/ui/webui/options/certificate_manager_handler.cc b/chrome/browser/ui/webui/options/certificate_manager_handler.cc
index f5d3573fc9adc20a6ed1ddfa39d5123b27df578f..d67ffa1f9a94392b224956fe1ba47374c64e1094 100644
--- a/chrome/browser/ui/webui/options/certificate_manager_handler.cc
+++ b/chrome/browser/ui/webui/options/certificate_manager_handler.cc
@@ -983,8 +983,12 @@ void CertificateManagerHandler::Export(const base::ListValue* args) {
   net::X509Certificate* cert = cert_id_map_->CallbackArgsToCert(args);
   if (!cert)
     return;
-  ShowCertExportDialog(web_ui()->GetWebContents(), GetParentWindow(),
-                       cert->os_cert_handle());
+  net::X509Certificate::OSCertHandles cert_chain;
+  cert->GetCertificateChain(&cert_chain);
+  ShowCertExportDialog(web_ui()->GetWebContents(),
+                       GetParentWindow(),
+                       cert_chain.begin(),
+                       cert_chain.end());
 }
 
 void CertificateManagerHandler::Delete(const base::ListValue* args) {