Record the time when the interstitial is constructed

chrome/browser/ssl/cert_report_helper.h

Index: chrome/browser/ssl/cert_report_helper.h
diff --git a/chrome/browser/ssl/cert_report_helper.h b/chrome/browser/ssl/cert_report_helper.h
index 868a3c90c427ab507f1d16ef9f12dfb798a710db..ce37f4aab02c2b998ebc8ee0bfc69c1ce5a56134 100644
--- a/chrome/browser/ssl/cert_report_helper.h
+++ b/chrome/browser/ssl/cert_report_helper.h
@@ -44,6 +44,7 @@ class CertReportHelper {
                    certificate_reporting::ErrorReport::InterstitialReason
                        interstitial_reason,
                    bool overridable,
+                   const base::Time& interstitial_time,
                    security_interstitials::MetricsHelper* metrics_helper);
 
   virtual ~CertReportHelper();
@@ -88,6 +89,8 @@ class CertReportHelper {
   // True if the user was given the option to proceed through the
   // certificate chain error being reported.
   bool overridable_;
+  // The time at which the interstitial was constructed.
+  const base::Time interstitial_time_;
   // Helpful for recording metrics about cert reports.
   security_interstitials::MetricsHelper* metrics_helper_;