Create a common base class for all the webdatas

chrome/browser/webdata/autofill_web_data_service_impl.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 CHROME_BROWSER_WEBDATA_AUTOFILL_WEB_DATA_SERVICE_IMPL_H_
 #define CHROME_BROWSER_WEBDATA_AUTOFILL_WEB_DATA_SERVICE_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/api/webdata/autofill_web_data_service.h"
 
 class WebDataService;
 
 // This aggregates a WebDataService and delegates all method calls to
 // it.
 class AutofillWebDataServiceImpl : public AutofillWebDataService {
  public:
   explicit AutofillWebDataServiceImpl(scoped_refptr<WebDataService> service);
-  virtual ~AutofillWebDataServiceImpl();
 
   // AutofillWebData implementation.
   virtual void AddFormFields(
       const std::vector<FormFieldData>& fields) OVERRIDE;
   virtual WebDataServiceBase::Handle GetFormValuesForElementName(
       const string16& name,
       const string16& prefix,
       int limit,
       WebDataServiceConsumer* consumer) OVERRIDE;
   virtual void RemoveExpiredFormElements() OVERRIDE;
   virtual void RemoveFormValueForElementName(const string16& name,
                                              const string16& value) OVERRIDE;
   virtual void AddAutofillProfile(const AutofillProfile& profile) OVERRIDE;
   virtual void UpdateAutofillProfile(const AutofillProfile& profile) OVERRIDE;
   virtual void RemoveAutofillProfile(const std::string& guid) OVERRIDE;
   virtual WebDataServiceBase::Handle GetAutofillProfiles(
       WebDataServiceConsumer* consumer) OVERRIDE;
   virtual void AddCreditCard(const CreditCard& credit_card) OVERRIDE;
   virtual void UpdateCreditCard(const CreditCard& credit_card) OVERRIDE;
   virtual void RemoveCreditCard(const std::string& guid) OVERRIDE;
   virtual WebDataServiceBase::Handle
       GetCreditCards(WebDataServiceConsumer* consumer) OVERRIDE;
 
-  // WebDataServiceBase implementation.
-  virtual void CancelRequest(Handle h) OVERRIDE;
-  virtual content::NotificationSource GetNotificationSource() OVERRIDE;
+ protected:
+  virtual ~AutofillWebDataServiceImpl();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AutofillWebDataServiceImpl);
 
   const scoped_refptr<WebDataService> service_;
 };
 
 #endif  // CHROME_BROWSER_WEBDATA_AUTOFILL_WEB_DATA_SERVICE_IMPL_H_