[Autofill] Put Autofill Profile Cleanup behing a feature flag.

components/autofill/core/browser/autofill_experiments.h

Index: components/autofill/core/browser/autofill_experiments.h
diff --git a/components/autofill/core/browser/autofill_experiments.h b/components/autofill/core/browser/autofill_experiments.h
index 8b45df0888ad33104905b2a51fff793d7ce7f902..390ed55a49d12269af859862b7e4081013fd26d5 100644
--- a/components/autofill/core/browser/autofill_experiments.h
+++ b/components/autofill/core/browser/autofill_experiments.h
@@ -7,6 +7,10 @@
 
 #include <string>
 
+namespace base {
+struct Feature;
+}
+
 namespace sync_driver {
 class SyncService;
 }
@@ -15,6 +19,8 @@ class PrefService;
 
 namespace autofill {
 
+extern const base::Feature kAutofillProfileCleanup;
+
 // Returns true if autofill should be enabled. See also
 // IsInAutofillSuggestionsDisabledExperiment below.
 bool IsAutofillEnabled(const PrefService* pref_service);
@@ -25,6 +31,9 @@ bool IsAutofillEnabled(const PrefService* pref_service);
 // disables providing suggestions.
 bool IsInAutofillSuggestionsDisabledExperiment();
 
+// Returns whether the Autofill profile cleanup feature is enabled.
+bool IsAutofillProfileCleanupEnabled();
+
 // Returns true if the user should be offered to locally store unmasked cards.
 // This controls whether the option is presented at all rather than the default
 // response of the option.