components: Cleanup class/struct fwd declarations

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

 // Copyright 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_CORE_BROWSER_WEBDATA_AUTOFILL_WEBDATA_SERVICE_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_WEBDATA_SERVICE_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 10 matching lines @@
 #include "components/webdata/common/web_database.h"
 
 class WebDatabaseService;
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace autofill {
 
-class AutofillChange;
 class AutofillEntry;
 class AutofillProfile;
 class AutofillWebDataBackend;
 class AutofillWebDataBackendImpl;
 class AutofillWebDataServiceObserverOnDBThread;
 class AutofillWebDataServiceObserverOnUIThread;
 class CreditCard;
 
 // API for Autofill web data.
 class AutofillWebDataService : public AutofillWebData,
@@ skipping 109 matching lines @@
   // This factory is used on the UI thread. All vended weak pointers are
   // invalidated in ShutdownOnUIThread().
   base::WeakPtrFactory<AutofillWebDataService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillWebDataService);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_WEBDATA_SERVICE_H_