Add upstream bits necessary for iOS card unmask prompt.

components/autofill/core/browser/autofill_metrics_unittest.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 <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_service.h"
@@ skipping 1292 matching lines @@
   // |form_structure| will be owned by |autofill_manager_|.
   autofill_manager_->AddSeenForm(form, field_types, field_types);
 
   {
     // Simulating selecting a masked card server suggestion.
     base::HistogramTester histogram_tester;
     SuggestionBackendID guid(
         "10000000-0000-0000-0000-000000000002", 0); // masked server card
     autofill_manager_->FillOrPreviewForm(
         AutofillDriver::FORM_DATA_ACTION_FILL,
-        0, form, form.fields.front(),
+        0, form, form.fields[2],
         autofill_manager_->MakeFrontendID(guid, SuggestionBackendID()));
     histogram_tester.ExpectBucketCount(
         "Autofill.FormEvents.CreditCard",
         AutofillMetrics::FORM_EVENT_MASKED_SERVER_CARD_SUGGESTION_SELECTED, 1);
     histogram_tester.ExpectBucketCount(
         "Autofill.FormEvents.CreditCard",
         AutofillMetrics::FORM_EVENT_MASKED_SERVER_CARD_SUGGESTION_SELECTED_ONCE,
         1);
   }
 
   // Reset the autofill manager state.
   autofill_manager_->Reset();
   autofill_manager_->AddSeenForm(form, field_types, field_types);
 
   {
     // Simulating selecting multiple times a masked card server.
     base::HistogramTester histogram_tester;
     SuggestionBackendID guid(
         "10000000-0000-0000-0000-000000000002", 0); // masked server card
     autofill_manager_->FillOrPreviewForm(
         AutofillDriver::FORM_DATA_ACTION_FILL,
-        0, form, form.fields.front(),
+        0, form, form.fields[2],
         autofill_manager_->MakeFrontendID(guid, SuggestionBackendID()));
     autofill_manager_->FillOrPreviewForm(
         AutofillDriver::FORM_DATA_ACTION_FILL,
-        0, form, form.fields.front(),
+        0, form, form.fields[2],
         autofill_manager_->MakeFrontendID(guid, SuggestionBackendID()));
     histogram_tester.ExpectBucketCount(
         "Autofill.FormEvents.CreditCard",
         AutofillMetrics::FORM_EVENT_MASKED_SERVER_CARD_SUGGESTION_SELECTED, 2);
     histogram_tester.ExpectBucketCount(
         "Autofill.FormEvents.CreditCard",
         AutofillMetrics::FORM_EVENT_MASKED_SERVER_CARD_SUGGESTION_SELECTED_ONCE,
         1);
   }
 }
@@ skipping 1690 matching lines @@
     histogram_tester.ExpectTotalCount(
         "Autofill.FillDuration.FromInteraction.WithAutofill", 0);
     histogram_tester.ExpectTotalCount(
         "Autofill.FillDuration.FromInteraction.WithoutAutofill", 0);
 
     autofill_manager_->Reset();
   }
 }
 
 }  // namespace autofill