Get rid of unnecessary forward declarations in components/autofill/

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

 // Copyright 2014 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_PROFILE_SYNCABLE_SERVICE_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_PROFILE_SYNCABLE_SERVICE_H_
 
 #if !defined(AUTOFILL_ENABLE_SYNC)
 #error "This file should be built only when sync is enabled in Autofill"
 #endif
 
@@ skipping 13 matching lines @@
 #include "components/autofill/core/browser/webdata/autofill_entry.h"
 #include "components/autofill/core/browser/webdata/autofill_webdata_backend.h"
 #include "components/autofill/core/browser/webdata/autofill_webdata_service_observer.h"
 #include "sync/api/sync_change.h"
 #include "sync/api/sync_data.h"
 #include "sync/api/sync_error.h"
 #include "sync/api/syncable_service.h"
 #include "sync/protocol/autofill_specifics.pb.h"
 
 class ProfileSyncServiceAutofillTest;
-class WebDataServiceBase;
 
 namespace autofill {
 
 class AutofillProfile;
 class AutofillTable;
 class AutofillWebDataService;
-class FormGroup;
 
 extern const char kAutofillProfileTag[];
 
 // The sync implementation for AutofillProfiles.
 // MergeDataAndStartSyncing() called first, it does cloud->local and
 // local->cloud syncs. Then for each cloud change we receive
 // ProcessSyncChanges() and for each local change Observe() is called.
 class AutofillProfileSyncableService
     : public base::SupportsUserData::Data,
       public syncer::SyncableService,
@@ skipping 162 matching lines @@
   // When we go through sync we find profiles that are similar but unmatched.
   // Merge such profiles.
   GUIDToProfileMap candidates_to_merge;
   // Profiles that have multi-valued fields that are not in sync.
   std::vector<AutofillProfile*> profiles_to_sync_back;
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_PROFILE_SYNCABLE_SERVICE_H_