Refactor notifications of chrome/browser/webdata

chrome/browser/webdata/autofill_web_data_service_impl.cc

 // 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.
 
 #include "chrome/browser/webdata/autofill_web_data_service_impl.h"
 
 #include "base/logging.h"
 #include "chrome/browser/webdata/web_data_service.h"
 
 AutofillWebDataServiceImpl::AutofillWebDataServiceImpl(
@@ skipping 63 matching lines @@
 
 WebDataServiceBase::Handle
 AutofillWebDataServiceImpl::GetCreditCards(WebDataServiceConsumer* consumer) {
   return service_->GetCreditCards(consumer);
 }
 
 void AutofillWebDataServiceImpl::CancelRequest(Handle h) {
   service_->CancelRequest(h);
 }
 
-content::NotificationSource
-AutofillWebDataServiceImpl::GetNotificationSource() {
-  return service_->GetNotificationSource();
+void AutofillWebDataServiceImpl::AddObserver(WebDataServiceObserver* observer) {
+  service_->AddObserver(observer);
 }
+
+void AutofillWebDataServiceImpl::RemoveObserver(
+    WebDataServiceObserver* observer) {
+  service_->RemoveObserver(observer);
+}