Introduced Finch experiment for ignoring CVC server predictions.

Bug: 1021543
Change-Id: I794550c57e46d78bbca1ae9ec857e2a27d338874
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1899779
Auto-Submit: Matthias Körber <koerber@google.com>
Commit-Queue: Matthias Körber <koerber@google.com>
Reviewed-by: Maxim Kolosovskiy <kolos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712720}

components/autofill/core/browser/form_structure.cc

@@ -823,6 +823,14 @@ void FormStructure::ProcessQueryResponse(
       if (heuristic_type != UNKNOWN_TYPE)
         heuristics_detected_fillable_field = true;
 
+      // Clears the server prediction for CVC-fields if the corresponding Finch
+      // feature is not enabled.
+      if (!base::FeatureList::IsEnabled(
+              autofill::features::kAutofillUseServerCVCPrediction) &&
+          field_type == ServerFieldType::CREDIT_CARD_VERIFICATION_CODE) {
+        field_type = ServerFieldType::NO_SERVER_DATA;
+      }
+
       field->set_server_type(field_type);
       std::vector<AutofillQueryResponseContents::Field::FieldPrediction>
           server_predictions;

components/autofill/core/common/autofill_features.cc

@@ -191,6 +191,10 @@ const base::Feature kAutofillUseImprovedLabelDisambiguation{
     "AutofillUseImprovedLabelDisambiguation",
     base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Server predictions for CVC fields are used if the feature is enabled.
+const base::Feature kAutofillUseServerCVCPrediction{
+    "AutofillUseServerCVCPrediction", base::FEATURE_ENABLED_BY_DEFAULT};
+
 #if defined(OS_ANDROID)
 // Controls whether the Autofill manual fallback for Addresses and Payments is
 // present on Android.

components/autofill/core/common/autofill_features.h

@@ -57,7 +57,7 @@ extern const base::Feature kAutofillTouchToFill;
 extern const base::Feature kAutofillUploadThrottling;
 extern const base::Feature kAutofillUseApi;
 extern const base::Feature kAutofillUseImprovedLabelDisambiguation;
-
+extern const base::Feature kAutofillUseServerCVCPrediction;
 #if defined(OS_ANDROID)
 extern const base::Feature kAutofillManualFallbackAndroid;
 extern const base::Feature kAutofillRefreshStyleAndroid;