components: Cleanup class/struct fwd declarations

components/drive/chromeos/change_list_loader.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_CHANGE_LIST_LOADER_H_
 #define COMPONENTS_DRIVE_CHROMEOS_CHANGE_LIST_LOADER_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "base/observer_list.h"
 #include "base/threading/thread_checker.h"
 #include "components/drive/file_errors.h"
 #include "google_apis/drive/drive_api_error_codes.h"
 #include "google_apis/drive/drive_common_callbacks.h"
 
-class GURL;
-
 namespace base {
 class CancellationFlag;
 class ScopedClosureRunner;
 class SequencedTaskRunner;
 class Time;
 }  // namespace base
 
 namespace google_apis {
 class AboutResource;
 }  // namespace google_apis
 
 namespace drive {
 
 class EventLogger;
 class JobScheduler;
-class ResourceEntry;
 
 namespace internal {
 
 class ChangeList;
 class ChangeListLoaderObserver;
 class ChangeListProcessor;
-class DirectoryLoader;
 class ResourceMetadata;
 
 // Delays execution of tasks as long as more than one lock is alive.
 // Used to ensure that ChangeListLoader does not cause race condition by adding
 // new entries created by sync tasks before they do.
 // All code which may add entries found on the server to the local metadata
 // should use this class.
 class LoaderController {
  public:
   LoaderController();
@@ skipping 185 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<ChangeListLoader> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(ChangeListLoader);
 };
 
 }  // namespace internal
 }  // namespace drive
 
 #endif  // COMPONENTS_DRIVE_CHROMEOS_CHANGE_LIST_LOADER_H_