Use JS Date().toLocaleDateString() to format date in header.

chrome/renderer/printing/print_web_view_helper.cc

Index: chrome/renderer/printing/print_web_view_helper.cc
diff --git a/chrome/renderer/printing/print_web_view_helper.cc b/chrome/renderer/printing/print_web_view_helper.cc
index 668c5b1b2d4d2b05654259219ae1031021b19673..9d87d459823c183c2df5716fa4ebd8c7d06b8036 100644
--- a/chrome/renderer/printing/print_web_view_helper.cc
+++ b/chrome/renderer/printing/print_web_view_helper.cc
@@ -1483,8 +1483,8 @@ bool PrintWebViewHelper::UpdatePrintSettings(
     // Header/Footer: Set |header_footer_info_|.
     if (settings.params.display_header_footer) {
       header_footer_info_.reset(new base::DictionaryValue());
-      header_footer_info_->SetString(kSettingHeaderFooterDate,
-                                     settings.params.date);
+      header_footer_info_->SetInteger(kSettingHeaderFooterDate,
+          static_cast<int>(base::Time::Now().ToDoubleT()));

[Lei Zhang, 2013/10/22 18:45:17]

Is base::Time::ToJsTime() more appropriate here? You can use SetDouble to avoid
casting.

[Vitaly Buka (NO REVIEWS), 2013/10/22 21:24:40]

Unexpected.
Done.

       header_footer_info_->SetString(kSettingHeaderFooterURL,
                                      settings.params.url);
       header_footer_info_->SetString(kSettingHeaderFooterTitle,