Use Observer to notify of WebDB load instead of callbacks

components/autofill/browser/webdata/autofill_webdata_service_observer.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_AUTOFILL_BROWSER_WEBDATA_AUTOFILL_WEBDATA_SERVICE_OBSERVER_H_
 #define COMPONENTS_AUTOFILL_BROWSER_WEBDATA_AUTOFILL_WEBDATA_SERVICE_OBSERVER_H_
 
 #include "components/autofill/browser/webdata/autofill_change.h"
 
 namespace autofill {
 
 class AutofillWebDataServiceObserverOnDBThread {
  public:
   // Called on DB thread whenever Autofill entries are changed.
   virtual void AutofillEntriesChanged(const AutofillChangeList& changes) {}
 
   // Called on DB thread when an AutofillProfile has been added/removed/updated
   // in the WebDatabase.
   virtual void AutofillProfileChanged(const AutofillProfileChange& change) {}
 
  protected:
   virtual ~AutofillWebDataServiceObserverOnDBThread() {}
 };
 
 class AutofillWebDataServiceObserverOnUIThread {
  public:
-  // Called on UI thread whenever the web database service has finished loading
-  // the web database.
-  virtual void WebDatabaseLoaded() {}
-
   // Called on UI thread when multiple Autofill entries have been modified by
   // Sync.
   virtual void AutofillMultipleChanged() {}
 
  protected:
   virtual ~AutofillWebDataServiceObserverOnUIThread() {}
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_BROWSER_WEBDATA_AUTOFILL_WEBDATA_SERVICE_OBSERVER_H_