Assert that form submission state is not one of the autofill states when

components/autofill/core/browser/autofill_metrics.cc

Index: components/autofill/core/browser/autofill_metrics.cc
diff --git a/components/autofill/core/browser/autofill_metrics.cc b/components/autofill/core/browser/autofill_metrics.cc
index bb0cac81f67629473b4d857d929317467d220e6d..2f9c996895b6c5782f5a76999f239e3310e90876 100644
--- a/components/autofill/core/browser/autofill_metrics.cc
+++ b/components/autofill/core/browser/autofill_metrics.cc
@@ -1141,8 +1141,11 @@ void AutofillMetrics::FormInteractionsUkmLogger::LogFormSubmitted(
       source_id_, internal::kUKMFormSubmittedEntryName);
   builder->AddMetric(internal::kUKMAutofillFormSubmittedStateMetricName,
                      static_cast<int>(state));
-  builder->AddMetric(internal::kUKMMillisecondsSinceFormParsedMetricName,
-                     MillisecondsSinceFormParsed());
+  if (form_parsed_timestamp_.is_null())
+    DCHECK_EQ(state, NON_FILLABLE_FORM_OR_NEW_DATA);
+  else
+    builder->AddMetric(internal::kUKMMillisecondsSinceFormParsedMetricName,
+                       MillisecondsSinceFormParsed());
 }
 
 void AutofillMetrics::FormInteractionsUkmLogger::UpdateSourceURL(