[Autofill] Added kill switches for filling and import.

This CL adds two features which, if enabled, suppress filling and form
import.

Bug: 1166660
Change-Id: Ia4e29345be0a1f638bb3650d7baf1bde9dc35fd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2627164
Commit-Queue: Christoph Schwering <schwering@google.com>
Reviewed-by: Matthias Körber <koerber@google.com>
Cr-Commit-Position: refs/heads/master@{#843606}

components/autofill/core/browser/autofill_manager.cc

@@ -754,6 +754,10 @@ void AutofillManager::OnFormSubmittedImpl(const FormData& form,
     return;
   }
 
+  if (base::FeatureList::IsEnabled(features::kAutofillDisableImport)) {
+    return;
+  }
+
   // Update Personal Data with the form's submitted data.
   // Also triggers offering local/upload credit card save, if applicable.
   client_->GetFormDataImporter()->ImportFormData(*submitted_form,
@@ -944,6 +948,10 @@ void AutofillManager::OnQueryFormFieldAutofillImpl(
     const FormFieldData& field,
     const gfx::RectF& transformed_box,
     bool autoselect_first_suggestion) {
+  if (base::FeatureList::IsEnabled(features::kAutofillDisableFilling)) {
+    return;
+  }
+
   SetDataList(field.datalist_values, field.datalist_labels);
   external_delegate_->OnQuery(query_id, form, field, transformed_box);
 

components/autofill/core/common/autofill_features.cc

@@ -54,6 +54,14 @@ const base::Feature kAutofillCacheQueryResponses{
 const base::Feature kAutofillCreateDataForTest{
     "AutofillCreateDataForTest", base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Kill switch for Autofill filling.
+const base::Feature kAutofillDisableFilling{"AutofillDisableFilling",
+                                            base::FEATURE_DISABLED_BY_DEFAULT};
+
+// Kill switch for Autofill import.
+const base::Feature kAutofillDisableImport{"AutofillDisableImport",
+                                           base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Controls if Chrome support filling and importing apartment numbers.
 // TODO(crbug.com/1153715): Remove once launched.
 const base::Feature kAutofillEnableSupportForApartmentNumbers{

components/autofill/core/common/autofill_features.h

@@ -27,6 +27,8 @@ extern const base::Feature kAutofillAllowDuplicateFormSubmissions;
 extern const base::Feature kAutofillAllowNonHttpActivation;
 extern const base::Feature kAutofillCacheQueryResponses;
 extern const base::Feature kAutofillCreateDataForTest;
+extern const base::Feature kAutofillDisableFilling;
+extern const base::Feature kAutofillDisableImport;
 extern const base::Feature kAutofillEnableAccountWalletStorage;
 extern const base::Feature kAutofillEnableAugmentedPhoneCountryCode;
 extern const base::Feature kAutofillEnableDependentLocalityParsing;