[Password Generation] Use signatures for form matching

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 <memory>
 #include <vector>
@@ skipping 737 matching lines @@
   response.add_field()->set_autofill_type(NAME_FIRST);
   // Server response will have no data.
   response.add_field()->set_autofill_type(NO_SERVER_DATA);
   // Not logged.
   response.add_field()->set_autofill_type(NAME_MIDDLE);
 
   std::string response_string;
   ASSERT_TRUE(response.SerializeToString(&response_string));
 
   std::vector<std::string> signatures;
-  signatures.push_back(form_structure->FormSignature());
+  signatures.push_back(form_structure->FormSignatureAsStr());
 
   base::HistogramTester histogram_tester;
   autofill_manager_->OnLoadedServerPredictions(response_string, signatures);
 
   // Verify that FormStructure::ParseQueryResponse was called (here and below).
   histogram_tester.ExpectBucketCount("Autofill.ServerQueryResponse",
                                      AutofillMetrics::QUERY_RESPONSE_RECEIVED,
                                      1);
   histogram_tester.ExpectBucketCount("Autofill.ServerQueryResponse",
                                      AutofillMetrics::QUERY_RESPONSE_PARSED, 1);
@@ skipping 3300 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