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

components/autofill/core/browser/autofill_metrics.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/core/browser/autofill_metrics.h"
 
 #include <algorithm>
 #include <utility>
 #include <vector>
 
@@ skipping 1123 matching lines @@
   if (!CanLog())
     return;
 
   if (source_id_ == -1)
     GetNewSourceID();
 
   std::unique_ptr<ukm::UkmEntryBuilder> builder = ukm_service_->GetEntryBuilder(
       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(
     const GURL& url) {
   url_ = url;
   if (CanLog())
     ukm_service_->UpdateSourceURL(source_id_, url_);
 }
 
 bool AutofillMetrics::FormInteractionsUkmLogger::CanLog() const {
   return IsUkmLoggingEnabled() && ukm_service_ && url_.is_valid();
 }
 
 int64_t
 AutofillMetrics::FormInteractionsUkmLogger::MillisecondsSinceFormParsed()
     const {
   DCHECK(!form_parsed_timestamp_.is_null());
   return (base::TimeTicks::Now() - form_parsed_timestamp_).InMilliseconds();
 }
 
 void AutofillMetrics::FormInteractionsUkmLogger::GetNewSourceID() {
   source_id_ = ukm_service_->GetNewSourceID();
   ukm_service_->UpdateSourceURL(source_id_, url_);
 }
 
 }  // namespace autofill