[Autofill] Log the number of stored local credit cards

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 <stddef.h>
 
 #include <vector>
 
@@ skipping 1356 matching lines @@
   }
 
   // The metric should only be logged once.
   {
     base::HistogramTester histogram_tester;
     personal_data_->LoadProfiles();
     histogram_tester.ExpectTotalCount("Autofill.StoredProfileCount", 0);
   }
 }
 
+// Test that the local credit card count is logged correctly.
+TEST_F(AutofillMetricsTest, StoredLocalCreditCardCount) {
+  // The metric should be logged when the credit cards are first loaded.
+  {
+    base::HistogramTester histogram_tester;
+    personal_data_->RecreateCreditCards(
+        true /* include_local_credit_card */,
+        false /* include_masked_server_credit_card */,
+        false /* include_full_server_credit_card */);
+    histogram_tester.ExpectUniqueSample("Autofill.StoredLocalCreditCardCount",
+                                        1, 1);
+  }
+
+  // The metric should only be logged once.
+  {
+    base::HistogramTester histogram_tester;
+    personal_data_->RecreateCreditCards(
+        true /* include_local_credit_card */,
+        false /* include_masked_server_credit_card */,
+        false /* include_full_server_credit_card */);
+    histogram_tester.ExpectTotalCount("Autofill.StoredLocalCreditCardCount", 0);
+  }
+}
+
 // Test that we correctly log when Autofill is enabled.
 TEST_F(AutofillMetricsTest, AutofillIsEnabledAtStartup) {
   base::HistogramTester histogram_tester;
   personal_data_->set_autofill_enabled(true);
   personal_data_->Init(
       autofill_client_.GetDatabase(), autofill_client_.GetPrefs(),
       account_tracker_.get(), signin_manager_.get(), false);
   histogram_tester.ExpectUniqueSample("Autofill.IsEnabled.Startup", true, 1);
 }
 
@@ skipping 2203 matching lines @@
   EXPECT_THAT(
       histogram_tester.GetAllSamples("Autofill.ServerResponseHasDataForForm"),
       ElementsAre(Bucket(true, 2)));
 
   // No RAPPOR metrics are logged in the case there is at least some server data
   // available for all forms.
   EXPECT_EQ(0, rappor_service_.GetReportsCount());
 }
 
 }  // namespace autofill