SyncFS: Introduce RemoteSyncOperationResolver for directory operation support

chrome/browser/sync_file_system/drive_file_sync_service.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 CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_FILE_SYNC_SERVICE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_FILE_SYNC_SERVICE_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 186 matching lines @@
     LOCAL_SYNC_OPERATION_DELETE,
     LOCAL_SYNC_OPERATION_NONE,
     LOCAL_SYNC_OPERATION_NONE_CONFLICTED,
     LOCAL_SYNC_OPERATION_CONFLICT,
     LOCAL_SYNC_OPERATION_RESOLVE_TO_REMOTE,
     LOCAL_SYNC_OPERATION_FAIL,
   };
 
   enum RemoteSyncOperationType {
     REMOTE_SYNC_OPERATION_ADD_FILE,
+    REMOTE_SYNC_OPERATION_ADD_DIRECTORY,
     REMOTE_SYNC_OPERATION_UPDATE_FILE,
     REMOTE_SYNC_OPERATION_DELETE_FILE,
+    REMOTE_SYNC_OPERATION_DELETE_DIRECTORY,
     REMOTE_SYNC_OPERATION_NONE,
     REMOTE_SYNC_OPERATION_CONFLICT,
     REMOTE_SYNC_OPERATION_RESOLVE_TO_LOCAL,
     REMOTE_SYNC_OPERATION_RESOLVE_TO_REMOTE,
     REMOTE_SYNC_OPERATION_DELETE_METADATA,
     REMOTE_SYNC_OPERATION_FAIL,
   };
 
   typedef base::Callback<void(const base::Time& time,
                               SyncStatusCode status)> UpdatedTimeCallback;
@@ skipping 318 matching lines @@
   // Use WeakPtrFactory instead of SupportsWeakPtr to revoke the weak pointer
   // in |token_|.
   base::WeakPtrFactory<DriveFileSyncService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DriveFileSyncService);
 };
 
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_FILE_SYNC_SERVICE_H_