Simplify directory path accounting.

webkit/fileapi/file_system_test_helper.h

 // Copyright (c) 2011 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 WEBKIT_FILEAPI_FILE_SYSTEM_TEST_HELPER_H_
 #define WEBKIT_FILEAPI_FILE_SYSTEM_TEST_HELPER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 43 matching lines @@
   void TearDown();
 
   FilePath GetOriginRootPath() const;
   FilePath GetLocalPath(const FilePath& path);
   FilePath GetLocalPathFromASCII(const std::string& path);
   GURL GetURLForPath(const FilePath& path) const;
   FilePath GetUsageCachePath() const;
 
   int64 GetCachedOriginUsage() const;
   bool RevokeUsageCache() const;
+
+  // This doesn't work with OFSFU.
   int64 ComputeCurrentOriginUsage() const;
 
   FileSystemOperation* NewOperation(
       FileSystemCallbackDispatcher* callback_dispatcher);
   FileSystemOperationContext* NewOperationContext();
 
   FileSystemContext* file_system_context() const {
     return file_system_context_.get();
   }
 
@@ skipping 10 matching lines @@
   scoped_refptr<FileSystemContext> file_system_context_;
   const GURL origin_;
   const FileSystemType type_;
   FileSystemFileUtil* file_util_;
   int64 initial_usage_size_;
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_TEST_HELPER_H_