Modified the certificate details viewers to include the timezone in the certificates validity dates.

chrome/browser/ui/webui/certificate_viewer_webui.cc

Index: chrome/browser/ui/webui/certificate_viewer_webui.cc
diff --git a/chrome/browser/ui/webui/certificate_viewer_webui.cc b/chrome/browser/ui/webui/certificate_viewer_webui.cc
index f67d3498bf7798367c0957fbdcdde62f90f54064..60fee836be7f5f7e7d6c06171861a823ba11ea04 100644
--- a/chrome/browser/ui/webui/certificate_viewer_webui.cc
+++ b/chrome/browser/ui/webui/certificate_viewer_webui.cc
@@ -347,10 +347,11 @@ void CertificateViewerDialogHandler::RequestCertificateFields(
       l10n_util::GetStringUTF8(IDS_CERT_DETAILS_NOT_AFTER));
   base::Time issued, expires;
   if (x509_certificate_model::GetTimes(cert, &issued, &expires)) {
+    //The object Time internally save the time in UTC timezone.

[jww, 2014/05/27 17:25:34]

Please add a space before the comment per Chromium code style. Also, please
correct "save" to "saves". I'd also add some explanation about "this is why the
(UTC) string is concatenated."

     node_details->SetString("payload.val",
-        base::UTF16ToUTF8(base::TimeFormatShortDateAndTime(issued)));
+        base::UTF16ToUTF8(base::TimeFormatShortDateAndTime(issued)) + " (UTC)");

[jww, 2014/05/27 17:25:34]

This should probably be internationalized.

     alt_node_details->SetString("payload.val",
-        base::UTF16ToUTF8(base::TimeFormatShortDateAndTime(expires)));
+        base::UTF16ToUTF8(base::TimeFormatShortDateAndTime(expires)) + " (UTC)");

[jww, 2014/05/27 17:25:34]

See above comment on 352.

   }
 
   cert_fields->Append(node_details = new base::DictionaryValue());