[Merge M53] Run autofill-profile de-dupe after sync starts if sync is enabled.

components/autofill/core/browser/webdata/autofill_webdata_backend.h

Index: components/autofill/core/browser/webdata/autofill_webdata_backend.h
diff --git a/components/autofill/core/browser/webdata/autofill_webdata_backend.h b/components/autofill/core/browser/webdata/autofill_webdata_backend.h
index 8b06ffb926f53b07cac0ccb8307c976abdd9494f..5b913054bfdf6cbd416df70785b5d65964b64ff8 100644
--- a/components/autofill/core/browser/webdata/autofill_webdata_backend.h
+++ b/components/autofill/core/browser/webdata/autofill_webdata_backend.h
@@ -5,6 +5,8 @@
 #ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_WEBDATA_BACKEND_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_WEBDATA_BACKEND_H_
 
+#include "sync/internal_api/public/base/model_type.h"
+
 class WebDatabase;
 
 namespace autofill {
@@ -36,6 +38,11 @@ class AutofillWebDataBackend {
   // NOTE: This method is intended to be called from the DB thread. The UI
   // thread notifications are asynchronous.
   virtual void NotifyOfMultipleAutofillChanges() = 0;
+
+  // Notifies listeners on the UI thread that sync has started for |model_type|.
+  // NOTE: This method is intended to be called from the DB thread. The UI
+  // thread notifications are asynchronous.
+  virtual void NotifyThatSyncHasStarted(syncer::ModelType model_type) = 0;
 };
 
 } // namespace autofill