Test interstitials shouldn't use null SSLCertReporters

chrome/browser/ssl/cert_report_helper.cc

Index: chrome/browser/ssl/cert_report_helper.cc
diff --git a/chrome/browser/ssl/cert_report_helper.cc b/chrome/browser/ssl/cert_report_helper.cc
index 1c41bb4820754df112a5a5fd3476426bbaae7677..21e10036eab53c0fad1e34e7c0a5a2d3fbd81f5a 100644
--- a/chrome/browser/ssl/cert_report_helper.cc
+++ b/chrome/browser/ssl/cert_report_helper.cc
@@ -60,7 +60,9 @@ CertReportHelper::CertReportHelper(
       interstitial_reason_(interstitial_reason),
       overridable_(overridable),
       interstitial_time_(interstitial_time),
-      metrics_helper_(metrics_helper) {}
+      metrics_helper_(metrics_helper) {
+  DCHECK(ssl_cert_reporter);
+}
 
 CertReportHelper::~CertReportHelper() {
 }