components: Cleanup class/struct fwd declarations

components/drive/chromeos/sync_client.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 COMPONENTS_DRIVE_CHROMEOS_SYNC_CLIENT_H_
 #define COMPONENTS_DRIVE_CHROMEOS_SYNC_CLIENT_H_
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "components/drive/chromeos/resource_metadata.h"
 #include "components/drive/file_errors.h"
 #include "components/drive/job_scheduler.h"
 
 namespace base {
 class SequencedTaskRunner;
 }
 
 namespace drive {
 
-class FileCacheEntry;
 class JobScheduler;
 class ResourceEntry;
 struct ClientContext;
 
 namespace file_system {
 class DownloadOperation;
 class OperationDelegate;
 }
 
 namespace internal {
 
-class ChangeListLoader;
 class EntryUpdatePerformer;
 class FileCache;
 class LoaderController;
 class ResourceMetadata;
 
 // The SyncClient is used to synchronize pinned files on Drive and the
 // cache on the local drive.
 //
 // If the user logs out before fetching of the pinned files is complete, this
 // client resumes fetching operations next time the user logs in, based on
@@ skipping 141 matching lines @@
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<SyncClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncClient);
 };
 
 }  // namespace internal
 }  // namespace drive
 
 #endif  // COMPONENTS_DRIVE_CHROMEOS_SYNC_CLIENT_H_