components: Cleanup class/struct fwd declarations

components/sync/driver/sync_client.h

 // Copyright 2015 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_SYNC_DRIVER_SYNC_CLIENT_H_
 #define COMPONENTS_SYNC_DRIVER_SYNC_CLIENT_H_
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "components/sync/base/extensions_activity.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/driver/sync_api_component_factory.h"
 #include "components/sync/engine/model_safe_worker.h"
 #include "components/sync/model/model_type_sync_bridge.h"
 
 class BookmarkUndoService;
 class PrefService;
 
 namespace autofill {
-class AutocompleteSyncableService;
 class PersonalDataManager;
 }  // namespace autofill
 
 namespace bookmarks {
 class BookmarkModel;
 }  // namespace bookmarks
 
 namespace favicon {
 class FaviconService;
 }  // namespace favicon
@@ skipping 76 matching lines @@
   // Returns the current SyncApiComponentFactory instance.
   virtual SyncApiComponentFactory* GetSyncApiComponentFactory() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncClient);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DRIVER_SYNC_CLIENT_H_