Use Observer to notify of WebDB load instead of callbacks

components/autofill/browser/webdata/autofill_webdata_service.h

 // Copyright (c) 2012 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_H_
 #define COMPONENTS_AUTOFILL_BROWSER_WEBDATA_AUTOFILL_WEBDATA_SERVICE_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
@@ skipping 70 matching lines @@
 
   void AddObserver(AutofillWebDataServiceObserverOnDBThread* observer);
   void RemoveObserver(AutofillWebDataServiceObserverOnDBThread* observer);
 
   void AddObserver(AutofillWebDataServiceObserverOnUIThread* observer);
   void RemoveObserver(AutofillWebDataServiceObserverOnUIThread* observer);
 
  protected:
   virtual ~AutofillWebDataService();
 
-  // WebDataServiceBase overrides:
-  virtual void NotifyDatabaseLoadedOnUIThread() OVERRIDE;
-
  private:
   WebDatabase::State AddFormElementsImpl(
       const std::vector<FormFieldData>& fields, WebDatabase* db);
   scoped_ptr<WDTypedResult> GetFormValuesForElementNameImpl(
       const base::string16& name, const base::string16& prefix, int limit,
       WebDatabase* db);
   WebDatabase::State RemoveFormElementsAddedBetweenImpl(
       const base::Time& delete_begin, const base::Time& delete_end,
       WebDatabase* db);
   WebDatabase::State RemoveExpiredFormElementsImpl(WebDatabase* db);
@@ skipping 26 matching lines @@
 
   ObserverList<AutofillWebDataServiceObserverOnDBThread> db_observer_list_;
   ObserverList<AutofillWebDataServiceObserverOnUIThread> ui_observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillWebDataService);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_BROWSER_WEBDATA_AUTOFILL_WEBDATA_SERVICE_H_