Revert of [Autofill] Enable Autofill UKM by default.

components/autofill/core/browser/autofill_experiments.cc

Index: components/autofill/core/browser/autofill_experiments.cc
diff --git a/components/autofill/core/browser/autofill_experiments.cc b/components/autofill/core/browser/autofill_experiments.cc
index f9ecf5af76f08af124213c5a177e2661dfd62c8d..1a90549192a30958fb994bb7dcb158400a3451e0 100644
--- a/components/autofill/core/browser/autofill_experiments.cc
+++ b/components/autofill/core/browser/autofill_experiments.cc
@@ -33,6 +33,8 @@
     "AutofillCreditCardPopupLayout", base::FEATURE_DISABLED_BY_DEFAULT};
 const base::Feature kAutofillCreditCardLastUsedDateDisplay{
     "AutofillCreditCardLastUsedDateDisplay", base::FEATURE_DISABLED_BY_DEFAULT};
+const base::Feature kAutofillUkmLogging{"AutofillUkmLogging",
+                                        base::FEATURE_DISABLED_BY_DEFAULT};
 const base::Feature kAutofillUpstreamRequestCvcIfMissing{
     "AutofillUpstreamRequestCvcIfMissing", base::FEATURE_DISABLED_BY_DEFAULT};
 const base::Feature kAutofillUpstreamUseAutofillProfileComparatorForName{
@@ -234,6 +236,10 @@
   return !group_name.empty() && group_name != "Disabled";
 }
 
+bool IsUkmLoggingEnabled() {
+  return base::FeatureList::IsEnabled(kAutofillUkmLogging);
+}
+
 bool IsAutofillUpstreamRequestCvcIfMissingExperimentEnabled() {
 #if defined(OS_ANDROID)
   return false;